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High CPU usage #172

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vjpr opened this issue May 7, 2015 · 1 comment
Closed

High CPU usage #172

vjpr opened this issue May 7, 2015 · 1 comment

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@vjpr
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vjpr commented May 7, 2015

I am experiencing persistently high CPU usage (~60%) on MacBook Pro (Retina, Mid 2012) 2.7 GHz Intel Core i7.

I am running from CLI using io.js v1.6.3.

From Activity Monitor Statistics:

There are tons of Unix System Calls (~200K per second).

From Activity Monitor Open Files and Ports:

~/web
/Users/Vaughan/nvm/versions/io.js/v1.6.3/bin/iojs
~/web/node_modules/webpack-dev-server/node_modules/socket.io/node_modules/engine.io/node_modules/ws/build/Release/bufferutil.node
~/web/node_modules/webpack-dev-server/node_modules/socket.io/node_modules/engine.io/node_modules/ws/build/Release/validation.node
~/web/node_modules/webpack-dev-server/node_modules/socket.io-client/node_modules/engine.io-client/node_modules/ws/build/Release/bufferutil.node
~/web/node_modules/webpack-dev-server/node_modules/socket.io-client/node_modules/engine.io-client/node_modules/ws/build/Release/validation.node
~/web/node_modules/webpack/node_modules/watchpack/node_modules/chokidar/node_modules/fsevents/build/Release/fse.node
/usr/lib/dyld
/private/var/db/dyld/dyld_shared_cache_x86_64
/dev/ttys000
/dev/tty
/dev/tty
->0xb8416b0a4ad149c5
->0xb8416b0a4ad135d5
count=1, state=0
->0xb8416b0a5d0ea705
->0xb8416b0a473259a5
->0xb8416b0a47327105
->0xb8416b0a5d0ea9c5
/
/dev/tty
->0xb8416b0a53f37d25
->0xb8416b0a53f37235
/dev/tty
->0xb8416b0a3cf42c55
->0xb8416b0a3cf434ed
->0xb8416b0a53f3716d
localhost:redwood-broker

Here is a Sample output:

Sampling process 32427 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling node (pid 32427) every 1 millisecond
Process:         iojs [32427]
Path:            /Users/Vaughan/nvm/versions/io.js/v1.6.3/bin/iojs
Load Address:    0x100000000
Identifier:      iojs
Version:         ???
Code Type:       X86-64
Parent Process:  bash [1071]

Date/Time:       2015-05-07 12:36:03.059 -0400
OS Version:      Mac OS X 10.10.1 (14B25)
Report Version:  7
Analysis Tool:   /usr/bin/sample
----

Call graph:
    2110 Thread_513269   DispatchQueue_1: com.apple.main-thread  (serial)
    + 2110 start  (in node) + 52  [0x100000e74]
    +   2110 node::Start(int, char**)  (in node) + 420  [0x1005c5d56]
    +     1158 uv_run  (in node) + 526  [0x10062583d]
    +     ! 1100 uv__run_timers  (in node) + 38  [0x10062f00e]
    +     ! : 1096 timer_cb  (in node) + 74  [0x100622d93]
    +     ! : | 1028 uv_fs_stat  (in node) + 166  [0x100628282]
    +     ! : | + 837 post  (in node) + 25  [0x1006235e2]
    +     ! : | + ! 836 uv_mutex_lock  (in node) + 9  [0x10062e722]
    +     ! : | + ! : 828 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10,0  [0x7fff8c863162,0x7fff8c863158]
    +     ! : | + ! : 6 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 107,250,...  [0x7fff88a566a9,0x7fff88a56738,...]
    +     ! : | + ! : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +     ! : | + ! : 1 pthread_mutex_lock  (in libsystem_pthread.dylib) + 2  [0x7fff88a56639]
    +     ! : | + ! 1 DYLD-STUB$$pthread_mutex_lock  (in node) + 0  [0x100638aa4]
    +     ! : | + 93 post  (in node) + 68  [0x10062360d]
    +     ! : | + ! 93 uv_cond_signal  (in node) + 9  [0x10062e942]
    +     ! : | + !   81 __psynch_cvsignal  (in libsystem_kernel.dylib) + 10,0  [0x7fff8c86311a,0x7fff8c863110]
    +     ! : | + !   5 _pthread_cond_signal  (in libsystem_pthread.dylib) + 152,56,...  [0x7fff88a57783,0x7fff88a57723,...]
    +     ! : | + !   3 _pthread_cond_signal  (in libsystem_pthread.dylib) + 611  [0x7fff88a5794e]
    +     ! : | + !   : 2 _pthread_cond_updateval  (in libsystem_pthread.dylib) + 116,6  [0x7fff88a59002,0x7fff88a58f94]
    +     ! : | + !   : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +     ! : | + !   2 pthread_cond_signal  (in libsystem_pthread.dylib) + 2  [0x7fff88a591fb]
    +     ! : | + !   1 DYLD-STUB$$OSAtomicCompareAndSwap32Barrier  (in libsystem_pthread.dylib) + 0  [0x7fff88a5c23e]
    +     ! : | + !   1 _pthread_cond_signal  (in libsystem_pthread.dylib) + 587  [0x7fff88a57936]
    +     ! : | + !     1 __psynch_cvsignal  (in libsystem_kernel.dylib) + 20  [0x7fff8c863124]
    +     ! : | + 88 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
    +     ! : | + ! 82 __psynch_mutexdrop  (in libsystem_kernel.dylib) + 10,0  [0x7fff8c86314a,0x7fff8c863140]
    +     ! : | + ! 4 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 63  [0x7fff88a56be2]
    +     ! : | + ! : 3 __mtx_droplock  (in libsystem_pthread.dylib) + 547,94,...  [0x7fff88a56ebd,0x7fff88a56cf8,...]
    +     ! : | + ! : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +     ! : | + ! 2 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 108,133  [0x7fff88a56c0f,0x7fff88a56c28]
    +     ! : | + 4 uv__work_submit  (in node) + 42  [0x100623643]
    +     ! : | + ! 2 DYLD-STUB$$pthread_once  (in node) + 0  [0x100638ac8]
    +     ! : | + ! 1 uv_once  (in node) + 9  [0x10062e838]
    +     ! : | + ! : 1 pthread_once  (in libsystem_pthread.dylib) + 0  [0x7fff88a57aee]
    +     ! : | + ! 1 uv_once  (in node) + 1  [0x10062e830]
    +     ! : | + 3 post  (in node) + 25,35,...  [0x1006235e2,0x1006235ec,...]
    +     ! : | + 2 uv_mutex_unlock  (in node) + 13,9  [0x10062e763,0x10062e75f]
    +     ! : | + 1 uv__work_submit  (in node) + 6  [0x10062361f]
    +     ! : | 66 uv_fs_stat  (in node) + 112  [0x10062824c]
    +     ! : | + 30 strdup  (in libsystem_c.dylib) + 18  [0x7fff93644f99]
    +     ! : | + ! 30 strlen  (in libsystem_c.dylib) + 14,0,...  [0x7fff935eb16e,0x7fff935eb160,...]
    +     ! : | + 22 strdup  (in libsystem_c.dylib) + 32  [0x7fff93644fa7]
    +     ! : | + ! 18 malloc  (in libsystem_malloc.dylib) + 42  [0x7fff95048395]
    +     ! : | + ! : 17 malloc_zone_malloc  (in libsystem_malloc.dylib) + 71  [0x7fff95049877]
    +     ! : | + ! : | 10 szone_malloc_should_clear  (in libsystem_malloc.dylib) + 317  [0x7fff95049f50]
    +     ! : | + ! : | + 8 tiny_malloc_from_free_list  (in libsystem_malloc.dylib) + 1,182,...  [0x7fff9504af95,0x7fff9504b04a,...]
    +     ! : | + ! : | + 1 tiny_malloc_from_free_list  (in libsystem_malloc.dylib) + 767  [0x7fff9504b293]
    +     ! : | + ! : | + ! 1 get_tiny_free_size  (in libsystem_malloc.dylib) + 67  [0x7fff9504eea1]
    +     ! : | + ! : | + 1 tiny_malloc_from_free_list  (in libsystem_malloc.dylib) + 1450  [0x7fff9504b53e]
    +     ! : | + ! : | +   1 tiny_free_list_add_ptr  (in libsystem_malloc.dylib) + 143  [0x7fff9504e2a5]
    +     ! : | + ! : | 5 szone_malloc_should_clear  (in libsystem_malloc.dylib) + 4361,76,...  [0x7fff9504af1c,0x7fff95049e5f,...]
    +     ! : | + ! : | 2 szone_malloc  (in libsystem_malloc.dylib) + 0  [0x7fff95049e07]
    +     ! : | + ! : 1 malloc_zone_malloc  (in libsystem_malloc.dylib) + 1  [0x7fff95049831]
    +     ! : | + ! 4 malloc  (in libsystem_malloc.dylib) + 1,61,...  [0x7fff9504836c,0x7fff950483a8,...]
    +     ! : | + 7 strdup  (in libsystem_c.dylib) + 56  [0x7fff93644fbf]
    +     ! : | + ! 4 _platform_memmove$VARIANT$Nehalem  (in libsystem_platform.dylib) + 141,74,...  [0x7fff921423cd,0x7fff9214238a,...]
    +     ! : | + ! 3 _platform_memmove$VARIANT$Ivybridge  (in libsystem_platform.dylib) + 0,1  [0x7fff92142300,0x7fff92142301]
    +     ! : | + 5 strdup  (in libsystem_c.dylib) + 1,6  [0x7fff93644f88,0x7fff93644f8d]
    +     ! : | + 2 DYLD-STUB$$memcpy  (in libsystem_c.dylib) + 0  [0x7fff9366e7c6]
    +     ! : | 2 uv_fs_stat  (in node) + 27,0  [0x1006281f7,0x1006281dc]
    +     ! : 4 timer_cb  (in node) + 78,5,...  [0x100622d97,0x100622d4e,...]
    +     ! 53 uv__run_timers  (in node) + 24  [0x10062f000]
    +     ! : 36 uv_timer_stop  (in node) + 105,279,...  [0x10062edf3,0x10062eea1,...]
    +     ! : 17 uv_timer_stop  (in node) + 264  [0x10062ee92]
    +     ! :   17 heap_node_swap  (in node) + 123,110,...  [0x10062f0b1,0x10062f0a4,...]
    +     ! 4 uv__run_timers  (in node) + 45,54,...  [0x10062f015,0x10062f01e,...]
    +     ! 1 uv__run_timers  (in node) + 32  [0x10062f008]
    +     !   1 uv_timer_again  (in node) + 1  [0x10062ef50]
    +     951 uv_run  (in node) + 276  [0x100625743]
    +     ! 931 kevent  (in libsystem_kernel.dylib) + 10  [0x7fff8c864216]
    +     ! 17 uv__io_poll  (in node) + 1581  [0x100632f42]
    +     ! : 17 uv__async_io  (in node) + 136  [0x1006252cc]
    +     ! :   17 uv__async_event  (in node) + 65  [0x100625149]
    +     ! :     15 uv__work_done  (in node) + 175  [0x10062383e]
    +     ! :     | 9 poll_cb  (in node) + 435  [0x100622b84]
    +     ! :     | + 9 uv_fs_req_cleanup  (in node) + 18  [0x1006286d2]
    +     ! :     | +   3 szone_free_definite_size  (in libsystem_malloc.dylib) + 3927,2403,...  [0x7fff9504dad6,0x7fff9504d4e2,...]
    +     ! :     | +   2 free  (in libsystem_malloc.dylib) + 61  [0x7fff9504b7c8]
    +     ! :     | +   ! 2 szone_size  (in libsystem_malloc.dylib) + 0,226  [0x7fff9504c84d,0x7fff9504c92f]
    +     ! :     | +   2 szone_free_definite_size  (in libsystem_malloc.dylib) + 2432  [0x7fff9504d4ff]
    +     ! :     | +   ! 2 tiny_free_list_add_ptr  (in libsystem_malloc.dylib) + 43,324  [0x7fff9504e241,0x7fff9504e35a]
    +     ! :     | +   1 szone_free_definite_size  (in libsystem_malloc.dylib) + 983  [0x7fff9504cf56]
    +     ! :     | +   ! 1 _os_lock_spin_lock  (in libsystem_platform.dylib) + 12  [0x7fff92145cd1]
    +     ! :     | +   1 szone_free_definite_size  (in libsystem_malloc.dylib) + 1583  [0x7fff9504d1ae]
    +     ! :     | +     1 tiny_free_list_remove_ptr  (in libsystem_malloc.dylib) + 135  [0x7fff9504ef3b]
    +     ! :     | 3 poll_cb  (in node) + 164,273,...  [0x100622a75,0x100622ae2,...]
    +     ! :     | 2 poll_cb  (in node) + 494  [0x100622bbf]
    +     ! :     | + 2 uv_timer_start  (in node) + 11,286  [0x10062ec37,0x10062ed4a]
    +     ! :     | 1 uv__fs_done  (in node) + 51  [0x10062705f]
    +     ! :     1 uv__fs_done  (in node) + 81  [0x10062707d]
    +     ! :     1 uv__work_done  (in node) + 156  [0x10062382b]
    +     ! 1 uv__io_poll  (in node) + 713  [0x100632bde]
    +     ! : 1 __pthread_sigmask  (in libsystem_kernel.dylib) + 10  [0x7fff8c8632b2]
    +     ! 1 uv__io_poll  (in node) + 733  [0x100632bf2]
    +     ! : 1 uv__hrtime  (in node) + 11  [0x1006309d9]
    +     ! 1 uv__io_poll  (in node) + 763  [0x100632c10]
    +     1 uv_run  (in node) + 279  [0x100625746]
    2110 Thread_513273
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         2110 node::Platform::WorkerBody(void*)  (in node) + 45  [0x1005ddae7]
    +           2110 node::TaskQueue::Shift()  (in node) + 38  [0x1005ddd34]
    +             2110 uv_cond_wait  (in node) + 9  [0x10062e96a]
    +               2110 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
    2110 Thread_513274
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         2110 node::Platform::WorkerBody(void*)  (in node) + 45  [0x1005ddae7]
    +           2110 node::TaskQueue::Shift()  (in node) + 38  [0x1005ddd34]
    +             2110 uv_cond_wait  (in node) + 9  [0x10062e96a]
    +               2110 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
    2110 Thread_513275
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         2110 node::Platform::WorkerBody(void*)  (in node) + 25  [0x1005ddad3]
    +           2110 node::TaskQueue::Shift()  (in node) + 38  [0x1005ddd34]
    +             2110 uv_cond_wait  (in node) + 9  [0x10062e96a]
    +               2110 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
    2110 Thread_513276
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         2110 node::Platform::WorkerBody(void*)  (in node) + 25  [0x1005ddad3]
    +           2110 node::TaskQueue::Shift()  (in node) + 38  [0x1005ddd34]
    +             2110 uv_cond_wait  (in node) + 9  [0x10062e96a]
    +               2110 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
    2110 Thread_513277: OptimizingCompi
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 v8::base::ThreadEntry(void*)  (in node) + 87  [0x100636247]
    +         2110 v8::internal::OptimizingCompilerThread::Run()  (in node) + 101  [0x10045efe5]
    +           2110 v8::base::Semaphore::Wait()  (in node) + 23  [0x1006347d7]
    +             2110 semaphore_wait_trap  (in libsystem_kernel.dylib) + 10  [0x7fff8c85e56a]
    2110 Thread_513279
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         2110 __select  (in libsystem_kernel.dylib) + 10  [0x7fff8c8633f6]
    2110 Thread_513282
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         2110 __select  (in libsystem_kernel.dylib) + 10  [0x7fff8c8633f6]
    2110 Thread_513283
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         1738 worker  (in node) + 203  [0x100623b77]
    +         ! 1738 uv_cond_wait  (in node) + 9  [0x10062e96a]
    +         !   1475 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
    +         !   261 _pthread_cond_wait  (in libsystem_pthread.dylib) + 835  [0x7fff88a58f2e]
    +         !   : 259 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
    +         !   : 1 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480  [0x7fff88a5681e]
    +         !   : 1 pthread_mutex_lock  (in libsystem_pthread.dylib) + 2  [0x7fff88a56639]
    +         !   1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +         !   1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 707  [0x7fff88a58eae]
    +         239 worker  (in node) + 190  [0x100623b6a]
    +         ! 238 uv_mutex_lock  (in node) + 9  [0x10062e722]
    +         ! : 234 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
    +         ! : 2 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480  [0x7fff88a5681e]
    +         ! : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +         ! : 1 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480  [0x7fff88a5681e]
    +         ! :   1 __psynch_mutexwait  (in libsystem_kernel.dylib) + 20  [0x7fff8c86316c]
    +         ! 1 uv_mutex_lock  (in node) + 13  [0x10062e726]
    +         85 worker  (in node) + 90  [0x100623b06]
    +         ! 84 stat$INODE64  (in libsystem_kernel.dylib) + 10  [0x7fff8c864a6e]
    +         ! 1 uv__fs_work  (in node) + 40  [0x1006265b1]
    +         41 worker  (in node) + 83  [0x100623aff]
    +         ! 41 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
    +         !   38 __psynch_mutexdrop  (in libsystem_kernel.dylib) + 10  [0x7fff8c86314a]
    +         !   2 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 63  [0x7fff88a56be2]
    +         !   : 1 DYLD-STUB$$OSAtomicCompareAndSwap64Barrier  (in libsystem_pthread.dylib) + 0  [0x7fff88a5c24a]
    +         !   : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +         !   1 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 73  [0x7fff88a56bec]
    +         3 worker  (in node) + 50,132  [0x100623ade,0x100623b30]
    +         2 worker  (in node) + 106  [0x100623b16]
    +         ! 1 DYLD-STUB$$pthread_mutex_lock  (in node) + 0  [0x100638aa4]
    +         ! 1 uv_mutex_lock  (in node) + 9  [0x10062e722]
    +         !   1 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 225  [0x7fff88a5671f]
    +         2 worker  (in node) + 182  [0x100623b62]
    +           2 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
    +             2 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 63  [0x7fff88a56be2]
    +               2 __mtx_droplock  (in libsystem_pthread.dylib) + 1,416  [0x7fff88a56c9b,0x7fff88a56e3a]
    2110 Thread_513284
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         1726 worker  (in node) + 203  [0x100623b77]
    +         ! 1726 uv_cond_wait  (in node) + 9  [0x10062e96a]
    +         !   1490 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
    +         !   229 _pthread_cond_wait  (in libsystem_pthread.dylib) + 835  [0x7fff88a58f2e]
    +         !   : 226 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
    +         !   : 2 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480,13  [0x7fff88a5681e,0x7fff88a5664b]
    +         !   : 1 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480  [0x7fff88a5681e]
    +         !   :   1 __psynch_mutexwait  (in libsystem_kernel.dylib) + 20  [0x7fff8c86316c]
    +         !   2 _pthread_cond_wait  (in libsystem_pthread.dylib) + 530  [0x7fff88a58dfd]
    +         !   : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +         !   : 1 __mtx_droplock  (in libsystem_pthread.dylib) + 213  [0x7fff88a56d6f]
    +         !   2 _pthread_cond_wait  (in libsystem_pthread.dylib) + 712  [0x7fff88a58eb3]
    +         !   : 2 _pthread_testcancel  (in libsystem_pthread.dylib) + 28  [0x7fff88a58f5f]
    +         !   :   2 OSSpinLockLock  (in libsystem_platform.dylib) + 0  [0x7fff92141fc8]
    +         !   2 _pthread_cond_wait  (in libsystem_pthread.dylib) + 693  [0x7fff88a58ea0]
    +         !   1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 132  [0x7fff88a58c6f]
    +         !     1 _pthread_testcancel  (in libsystem_pthread.dylib) + 23  [0x7fff88a58f5a]
    +         250 worker  (in node) + 190  [0x100623b6a]
    +         ! 250 uv_mutex_lock  (in node) + 9  [0x10062e722]
    +         !   244 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
    +         !   4 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480,484  [0x7fff88a5681e,0x7fff88a56822]
    +         !   2 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 0,8  [0x7fff92144340,0x7fff92144348]
    +         88 worker  (in node) + 90  [0x100623b06]
    +         ! 84 stat$INODE64  (in libsystem_kernel.dylib) + 10  [0x7fff8c864a6e]
    +         ! 2 uv__fs_work  (in node) + 94,40  [0x1006265e7,0x1006265b1]
    +         ! 1 DYLD-STUB$$stat$INODE64  (in node) + 0  [0x100638c24]
    +         ! 1 uv__fs_work  (in node) + 1405  [0x100626b06]
    +         !   1 uv__to_stat  (in node) + 0  [0x10062871b]
    +         45 worker  (in node) + 83  [0x100623aff]
    +         ! 45 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
    +         !   44 __psynch_mutexdrop  (in libsystem_kernel.dylib) + 10  [0x7fff8c86314a]
    +         !   1 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 73  [0x7fff88a56bec]
    +         1 worker  (in node) + 182  [0x100623b62]
    +           1 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
    +             1 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 63  [0x7fff88a56be2]
    +               1 __mtx_droplock  (in libsystem_pthread.dylib) + 209  [0x7fff88a56d6b]
    2110 Thread_513285
    + 2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
    +   2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
    +     2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
    +       2110 uv__thread_start  (in node) + 25  [0x10062e656]
    +         1732 worker  (in node) + 203  [0x100623b77]
    +         ! 1732 uv_cond_wait  (in node) + 9  [0x10062e96a]
    +         !   1503 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
    +         !   221 _pthread_cond_wait  (in libsystem_pthread.dylib) + 835  [0x7fff88a58f2e]
    +         !   : 220 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
    +         !   : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +         !   3 pthread_cond_wait  (in libsystem_pthread.dylib) + 0  [0x7fff88a58bca]
    +         !   1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 58  [0x7fff88a58c25]
    +         !   : 1 _pthread_cond_check_init  (in libsystem_pthread.dylib) + 240  [0x7fff88a57a4f]
    +         !   1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 132  [0x7fff88a58c6f]
    +         !   : 1 _pthread_testcancel  (in libsystem_pthread.dylib) + 28  [0x7fff88a58f5f]
    +         !   :   1 OSSpinLockLock  (in libsystem_platform.dylib) + 5  [0x7fff92141fcd]
    +         !   1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 530  [0x7fff88a58dfd]
    +         !   : 1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +         !   1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 712  [0x7fff88a58eb3]
    +         !   : 1 _pthread_testcancel  (in libsystem_pthread.dylib) + 28  [0x7fff88a58f5f]
    +         !   :   1 OSSpinLockLock  (in libsystem_platform.dylib) + 5  [0x7fff92141fcd]
    +         !   1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 693  [0x7fff88a58ea0]
    +         248 worker  (in node) + 190  [0x100623b6a]
    +         ! 248 uv_mutex_lock  (in node) + 9  [0x10062e722]
    +         !   245 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
    +         !   2 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480,107  [0x7fff88a5681e,0x7fff88a566a9]
    +         !   1 OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 8  [0x7fff92144348]
    +         72 worker  (in node) + 90  [0x100623b06]
    +         ! 70 stat$INODE64  (in libsystem_kernel.dylib) + 10,5  [0x7fff8c864a6e,0x7fff8c864a69]
    +         ! 1 uv__fs_work  (in node) + 2476  [0x100626f35]
    +         ! : 1 __error  (in libsystem_kernel.dylib) + 0  [0x7fff8c85ec8d]
    +         ! 1 uv__fs_work  (in node) + 40  [0x1006265b1]
    +         53 worker  (in node) + 83  [0x100623aff]
    +         ! 53 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
    +         !   52 __psynch_mutexdrop  (in libsystem_kernel.dylib) + 10  [0x7fff8c86314a]
    +         !   1 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 63  [0x7fff88a56be2]
    +         !     1 __mtx_droplock  (in libsystem_pthread.dylib) + 81  [0x7fff88a56ceb]
    +         3 worker  (in node) + 190,50,...  [0x100623b6a,0x100623ade,...]
    +         1 worker  (in node) + 106  [0x100623b16]
    +         ! 1 uv_mutex_lock  (in node) + 9  [0x10062e722]
    +         !   1 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 30  [0x7fff88a5665c]
    +         1 worker  (in node) + 182  [0x100623b62]
    +           1 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
    +             1 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 198  [0x7fff88a56c69]
    2110 Thread_513286
      2110 thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
        2110 _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
          2110 _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
            2110 uv__thread_start  (in node) + 25  [0x10062e656]
              1761 worker  (in node) + 203  [0x100623b77]
              ! 1760 uv_cond_wait  (in node) + 9  [0x10062e96a]
              ! : 1525 __psynch_cvwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863132]
              ! : 228 _pthread_cond_wait  (in libsystem_pthread.dylib) + 835  [0x7fff88a58f2e]
              ! : | 225 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
              ! : | 3 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480,484,...  [0x7fff88a5681e,0x7fff88a56822,...]
              ! : 4 _pthread_cond_wait  (in libsystem_pthread.dylib) + 132  [0x7fff88a58c6f]
              ! : | 4 _pthread_testcancel  (in libsystem_pthread.dylib) + 28  [0x7fff88a58f5f]
              ! : |   4 OSSpinLockLock  (in libsystem_platform.dylib) + 7  [0x7fff92141fcf]
              ! : 2 _pthread_cond_wait  (in libsystem_pthread.dylib) + 632,707  [0x7fff88a58e63,0x7fff88a58eae]
              ! : 1 _pthread_cond_wait  (in libsystem_pthread.dylib) + 712  [0x7fff88a58eb3]
              ! :   1 _pthread_testcancel  (in libsystem_pthread.dylib) + 31  [0x7fff88a58f62]
              ! 1 uv_cond_wait  (in node) + 9  [0x10062e96a]
              215 worker  (in node) + 190  [0x100623b6a]
              ! 215 uv_mutex_lock  (in node) + 9  [0x10062e722]
              !   212 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10,5  [0x7fff8c863162,0x7fff8c86315d]
              !   2 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480,484  [0x7fff88a5681e,0x7fff88a56822]
              !   1 _pthread_mutex_lock  (in libsystem_pthread.dylib) + 480  [0x7fff88a5681e]
              !     1 __psynch_mutexwait  (in libsystem_kernel.dylib) + 20  [0x7fff8c86316c]
              83 worker  (in node) + 90  [0x100623b06]
              ! 78 stat$INODE64  (in libsystem_kernel.dylib) + 10  [0x7fff8c864a6e]
              ! 3 uv__fs_work  (in node) + 40,2520,...  [0x1006265b1,0x100626f61,...]
              ! 1 uv__fs_work  (in node) + 1343  [0x100626ac8]
              ! : 1 stat$INODE64  (in libsystem_kernel.dylib) + 20  [0x7fff8c864a78]
              ! 1 uv__fs_work  (in node) + 2476  [0x100626f35]
              !   1 __error  (in libsystem_kernel.dylib) + 9  [0x7fff8c85ec96]
              46 worker  (in node) + 83  [0x100623aff]
              ! 46 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
              !   46 __psynch_mutexdrop  (in libsystem_kernel.dylib) + 10  [0x7fff8c86314a]
              2 worker  (in node) + 182  [0x100623b62]
              ! 2 uv_mutex_unlock  (in node) + 9  [0x10062e75f]
              !   2 pthread_mutex_unlock  (in libsystem_pthread.dylib) + 63  [0x7fff88a56be2]
              !     2 __mtx_droplock  (in libsystem_pthread.dylib) + 1  [0x7fff88a56c9b]
              1 worker  (in node) + 106  [0x100623b16]
              ! 1 uv_mutex_lock  (in node) + 9  [0x10062e722]
              !   1 __psynch_mutexwait  (in libsystem_kernel.dylib) + 10  [0x7fff8c863162]
              1 worker  (in node) + 166  [0x100623b52]
              ! 1 uv_async_send  (in node) + 8  [0x100625164]
              1 worker  (in node) + 50  [0x100623ade]

Total number in stack (recursive counted multiple, when >=5):
        13       __psynch_mutexwait  (in libsystem_kernel.dylib) + 0  [0x7fff8c863158]
        11       OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib) + 0  [0x7fff92144340]
        11       _pthread_body  (in libsystem_pthread.dylib) + 131  [0x7fff88a582fc]
        11       _pthread_start  (in libsystem_pthread.dylib) + 176  [0x7fff88a58279]
        11       thread_start  (in libsystem_pthread.dylib) + 13  [0x7fff88a564b1]
        10       _pthread_mutex_lock  (in libsystem_pthread.dylib) + 0  [0x7fff88a5663e]
        10       uv__thread_start  (in node) + 25  [0x10062e656]
        9       uv_mutex_unlock  (in node) + 9  [0x10062e75f]
        8       __psynch_cvwait  (in libsystem_kernel.dylib) + 0  [0x7fff8c863128]
        8       uv_cond_wait  (in node) + 9  [0x10062e96a]
        8       uv_mutex_lock  (in node) + 9  [0x10062e722]
        6       __mtx_droplock  (in libsystem_pthread.dylib) + 0  [0x7fff88a56c9a]
        6       pthread_mutex_unlock  (in libsystem_pthread.dylib) + 63  [0x7fff88a56be2]
        5       __psynch_mutexdrop  (in libsystem_kernel.dylib) + 0  [0x7fff8c863140]
        5       stat$INODE64  (in libsystem_kernel.dylib) + 0  [0x7fff8c864a64]

Sort by top of stack, same collapsed (when >= 5):
        __psynch_cvwait  (in libsystem_kernel.dylib)        14433
        __select  (in libsystem_kernel.dylib)        4220
        __psynch_mutexwait  (in libsystem_kernel.dylib)        2697
        semaphore_wait_trap  (in libsystem_kernel.dylib)        2110
        kevent  (in libsystem_kernel.dylib)        931
        stat$INODE64  (in libsystem_kernel.dylib)        317
        __psynch_mutexdrop  (in libsystem_kernel.dylib)        262
        __psynch_cvsignal  (in libsystem_kernel.dylib)        82
        uv_timer_stop  (in node)        36
        strlen  (in libsystem_c.dylib)        30
        _pthread_mutex_lock  (in libsystem_pthread.dylib)        24
        heap_node_swap  (in node)        17
        OSAtomicCompareAndSwapPtrBarrier$VARIANT$mp  (in libsystem_platform.dylib)        12
        __mtx_droplock  (in libsystem_pthread.dylib)        10
        OSSpinLockLock  (in libsystem_platform.dylib)        8
        tiny_malloc_from_free_list  (in libsystem_malloc.dylib)        8
        uv__fs_work  (in node)        7
        worker  (in node)        7
        _pthread_cond_wait  (in libsystem_pthread.dylib)        6
        _pthread_cond_signal  (in libsystem_pthread.dylib)        5
        pthread_mutex_unlock  (in libsystem_pthread.dylib)        5
        strdup  (in libsystem_c.dylib)        5
        szone_malloc_should_clear  (in libsystem_malloc.dylib)        5

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    0x7fff8a7eb000 -     0x7fff8a84aff3  com.apple.AE (681 - 681) <7F544183-A515-31A8-B45F-89A167F56216> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.framework/Versions/A/AE
    0x7fff8a8a3000 -     0x7fff8a8b4fff  libcmph.dylib (1) <46EC3997-DB5E-38AE-BBBB-A035A54AD3C0> /usr/lib/libcmph.dylib
    0x7fff8a910000 -     0x7fff8a93aff7  libdispatch.dylib (442.1.4) <502CF32B-669B-3709-8862-08188225E4F0> /usr/lib/system/libdispatch.dylib
    0x7fff8a943000 -     0x7fff8a94aff7  libcompiler_rt.dylib (35) <BF8FC133-EE10-3DA6-9B90-92039E28678F> /usr/lib/system/libcompiler_rt.dylib
    0x7fff8aa2a000 -     0x7fff8aa2aff7  libunc.dylib (29) <5676F7EA-C1DF-329F-B006-D2C3022B7D70> /usr/lib/system/libunc.dylib
    0x7fff8aa68000 -     0x7fff8aa6dfff  com.apple.DiskArbitration (2.6 - 2.6) <0DFF4D9B-2AC3-3B82-B5C5-30F4EFBD2DB9> /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
    0x7fff8ab16000 -     0x7fff8ac08fff  libxml2.2.dylib (26) <B834E7C8-EC3E-3382-BC5A-DA38DC4D720C> /usr/lib/libxml2.2.dylib
    0x7fff8ac09000 -     0x7fff8adeeff3  libicucore.A.dylib (531.30) <EF0E7544-E317-3550-A962-6AE65E78AF17> /usr/lib/libicucore.A.dylib
    0x7fff8b6de000 -     0x7fff8b6dffff  libsystem_secinit.dylib (18) <581DAD0F-6B63-3A48-B63B-917AF799ABAA> /usr/lib/system/libsystem_secinit.dylib
    0x7fff8b6e0000 -     0x7fff8b6ebff7  libkxld.dylib (2782.1.97) <CB1A1B57-54BE-3573-AE0C-B90ED6BAEEE2> /usr/lib/system/libkxld.dylib
    0x7fff8b835000 -     0x7fff8b87bff7  libauto.dylib (186) <A260789B-D4D8-316A-9490-254767B8A5F1> /usr/lib/libauto.dylib
    0x7fff8b89a000 -     0x7fff8b917fff  com.apple.CoreServices.OSServices (640.3 - 640.3) <28445162-08E9-3E24-84E4-617CE5FE1367> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServices.framework/Versions/A/OSServices
    0x7fff8b9fe000 -     0x7fff8ba0bff7  libbz2.1.0.dylib (36) <2DF83FBC-5C08-39E1-94F5-C28653791B5F> /usr/lib/libbz2.1.0.dylib
    0x7fff8be12000 -     0x7fff8be16fff  libsystem_stats.dylib (163.1.4) <1DB04436-5974-3F16-86CC-5FF5F390339C> /usr/lib/system/libsystem_stats.dylib
    0x7fff8c1be000 -     0x7fff8c1d7ff7  com.apple.CFOpenDirectory (10.10 - 187) <0ECA5D80-A045-3A2C-A60C-E1605F3AB6BD> /System/Library/Frameworks/OpenDirectory.framework/Versions/A/Frameworks/CFOpenDirectory.framework/Versions/A/CFOpenDirectory
    0x7fff8c72e000 -     0x7fff8c748ff7  libextension.dylib (55.1) <ECBDCC15-FA19-3578-961C-B45FCC994BAF> /usr/lib/libextension.dylib
    0x7fff8c749000 -     0x7fff8c7e7fff  com.apple.Metadata (10.7.0 - 916.1) <CD389631-0F23-3A29-B43A-E3FFB5BC9438> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata
    0x7fff8c84d000 -     0x7fff8c86afff  libsystem_kernel.dylib (2782.1.97) <93E0E0A9-75B6-3904-BB4E-4BC7C05F4B6B> /usr/lib/system/libsystem_kernel.dylib
    0x7fff8ced1000 -     0x7fff8ced3fff  libsystem_configuration.dylib (699.1.5) <9FBA1CE4-97D0-347E-A443-93ED94512E92> /usr/lib/system/libsystem_configuration.dylib
    0x7fff8cede000 -     0x7fff8cedffff  libDiagnosticMessagesClient.dylib (100) <2EE8E436-5CDC-34C5-9959-5BA218D507FB> /usr/lib/libDiagnosticMessagesClient.dylib
    0x7fff8cee1000 -     0x7fff8d0c6267  libobjc.A.dylib (646) <3B60CD90-74A2-3A5D-9686-B0772159792A> /usr/lib/libobjc.A.dylib
    0x7fff8d8cf000 -     0x7fff8d940ff7  com.apple.framework.IOKit (2.0.2 - 1050.1.21) <ED3B0B22-AACC-303B-BFC8-20ECD1AF6BA2> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
    0x7fff8dd4a000 -     0x7fff8dd75ff3  libarchive.2.dylib (30) <8CBB4416-EBE9-3574-8ADC-44655D245F39> /usr/lib/libarchive.2.dylib
    0x7fff8f448000 -     0x7fff8f77bff7  libmecabra.dylib (666.1) <CAFBC813-4894-3352-9B22-FFF116773A06> /usr/lib/libmecabra.dylib
    0x7fff8f7e2000 -     0x7fff8f7f8ff7  libsystem_asl.dylib (267) <F153AC5B-0542-356E-88C8-20A62CA704E2> /usr/lib/system/libsystem_asl.dylib
    0x7fff8f99f000 -     0x7fff8f9b0ff7  libz.1.dylib (55) <88C7C7DE-04B8-316F-8B74-ACD9F3DE1AA1> /usr/lib/libz.1.dylib
    0x7fff8fab7000 -     0x7fff8fad2ff7  libCRFSuite.dylib (34) <D64842BE-7BD4-3D0C-9842-1D202F7C2A51> /usr/lib/libCRFSuite.dylib
    0x7fff90ac1000 -     0x7fff90ac2fff  liblangid.dylib (117) <B54A4AA0-2E53-3671-90F5-AFF711C0EB9E> /usr/lib/liblangid.dylib
    0x7fff90c22000 -     0x7fff90c7cff7  com.apple.LanguageModeling (1.0 - 1) <ACA93FE0-A0E3-333E-AE3C-8EB7DE5F362F> /System/Library/PrivateFrameworks/LanguageModeling.framework/Versions/A/LanguageModeling
    0x7fff90c7d000 -     0x7fff90d6fff7  libiconv.2.dylib (42) <2A06D02F-8B76-3864-8D96-64EF5B40BC6C> /usr/lib/libiconv.2.dylib
    0x7fff90f03000 -     0x7fff9116bffb  com.apple.security (7.0 - 57031.1.35) <96141D1F-614E-32C4-8AC2-F47481F23F43> /System/Library/Frameworks/Security.framework/Versions/A/Security
    0x7fff91314000 -     0x7fff91363ff7  libstdc++.6.dylib (104.1) <803F6AC8-87DC-3E24-9E80-729B551F6FFF> /usr/lib/libstdc++.6.dylib
    0x7fff91364000 -     0x7fff9136eff7  com.apple.NetAuth (5.0 - 5.0) <B9EC5425-D38D-308C-865F-207E0A98BAC7> /System/Library/PrivateFrameworks/NetAuth.framework/Versions/A/NetAuth
    0x7fff914c4000 -     0x7fff914caff7  libsystem_networkextension.dylib (167.1.10) <29AB225B-D7FB-30ED-9600-65D44B9A9442> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff914cb000 -     0x7fff914ccff7  libsystem_blocks.dylib (65) <9615D10A-FCA7-3BE4-AA1A-1B195DACE1A1> /usr/lib/system/libsystem_blocks.dylib
    0x7fff914cd000 -     0x7fff914cdfff  libOpenScriptingUtil.dylib (162) <EFD79173-A9DA-3AE6-BE15-3948938204A6> /usr/lib/libOpenScriptingUtil.dylib
    0x7fff914d3000 -     0x7fff914dbfff  libsystem_dnssd.dylib (561.1.1) <62B70ECA-E40D-3C63-896E-7F00EC386DDB> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff9150f000 -     0x7fff9151afff  libcommonCrypto.dylib (60061) <D381EBC6-69D8-31D3-8084-5A80A32CB748> /usr/lib/system/libcommonCrypto.dylib
    0x7fff916ef000 -     0x7fff916f2fff  com.apple.xpc.ServiceManagement (1.0 - 1) <7E9E6BB7-AEE7-3F59-BAC0-59EAF105D0C8> /System/Library/Frameworks/ServiceManagement.framework/Versions/A/ServiceManagement
    0x7fff916f3000 -     0x7fff918f6ff3  com.apple.CFNetwork (720.1.1 - 720.1.1) <A82E71B3-2CDB-3840-A476-F2304D896E03> /System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
    0x7fff92116000 -     0x7fff9211bff7  libunwind.dylib (35.3) <BE7E51A0-B6EA-3A54-9CCA-9D88F683A6D6> /usr/lib/system/libunwind.dylib
    0x7fff9212c000 -     0x7fff92132fff  libsystem_trace.dylib (72.1.3) <A9E6B7D8-C327-3742-AC54-86C94218B1DF> /usr/lib/system/libsystem_trace.dylib
    0x7fff92133000 -     0x7fff92140ff7  libxar.1.dylib (254) <CE10EFED-3066-3749-838A-6A15AC0DBCB6> /usr/lib/libxar.1.dylib
    0x7fff92141000 -     0x7fff92149fff  libsystem_platform.dylib (63) <64E34079-D712-3D66-9CE2-418624A5C040> /usr/lib/system/libsystem_platform.dylib
    0x7fff92443000 -     0x7fff92445ff7  libquarantine.dylib (76) <DC041627-2D92-361C-BABF-A869A5C72293> /usr/lib/system/libquarantine.dylib
    0x7fff924bb000 -     0x7fff925fdfff  libsqlite3.dylib (168) <7B580EB9-9260-35FE-AE2F-276A2C242BAB> /usr/lib/libsqlite3.dylib
    0x7fff935ea000 -     0x7fff93676fff  libsystem_c.dylib (1044.1.2) <C185E862-7424-3210-B528-6B822577A4B8> /usr/lib/system/libsystem_c.dylib
    0x7fff93ba9000 -     0x7fff93bb1ffb  libcopyfile.dylib (118.1.2) <0C68D3A6-ACDD-3EF3-991A-CC82C32AB836> /usr/lib/system/libcopyfile.dylib
    0x7fff93c74000 -     0x7fff93c7bfff  com.apple.NetFS (6.0 - 4.0) <1581D25F-CC07-39B0-90E8-5D4F3CF84EBA> /System/Library/Frameworks/NetFS.framework/Versions/A/NetFS
    0x7fff93c7c000 -     0x7fff93c7fff7  libdyld.dylib (353.2.1) <19FAF435-C165-3374-9DEF-D7BBA7D61DB6> /usr/lib/system/libdyld.dylib
    0x7fff93c80000 -     0x7fff93ca9ffb  libxslt.1.dylib (13) <AED1143F-B848-3E73-81ED-71356F25F084> /usr/lib/libxslt.1.dylib
    0x7fff94275000 -     0x7fff942a0fff  com.apple.DictionaryServices (1.2 - 229) <6789EC43-CADA-394D-8FE8-FC3A2DD136B9> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/DictionaryServices.framework/Versions/A/DictionaryServices
    0x7fff94c77000 -     0x7fff94c87ff7  libbsm.0.dylib (34) <A3A2E56C-2B65-37C7-B43A-A1F926E1A0BB> /usr/lib/libbsm.0.dylib
    0x7fff94ce3000 -     0x7fff94ce3ff7  liblaunch.dylib (559.1.22) <8A988924-8BE7-35FE-BF7D-322E90EFE49E> /usr/lib/system/liblaunch.dylib
    0x7fff95047000 -     0x7fff95063ff7  libsystem_malloc.dylib (53.1.1) <19BCC257-5717-3502-A71F-95D65AFA861B> /usr/lib/system/libsystem_malloc.dylib
    0x7fff95064000 -     0x7fff95392ff7  com.apple.Foundation (6.9 - 1151.16) <18EDD673-A010-3E99-956E-DA594CE1FA80> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
    0x7fff95393000 -     0x7fff953c3fff  libsystem_m.dylib (3086.1) <1E12AB45-6D96-36D0-A226-F24D9FB0D9D6> /usr/lib/system/libsystem_m.dylib
    0x7fff953ca000 -     0x7fff95402ffb  libsystem_network.dylib (411) <C0B2313D-47BE-38A9-BEE6-2634A4F5E14B> /usr/lib/system/libsystem_network.dylib
    0x7fff955f4000 -     0x7fff9586efff  com.apple.CoreData (110 - 526) <AEEDAF00-D38F-3A15-B3C9-73732940CC55> /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
    0x7fff95b3a000 -     0x7fff95c5cff7  com.apple.LaunchServices (644.12 - 644.12) <D7710B20-0561-33BB-A3C8-463691D36E02> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/LaunchServices
    0x7fff95e38000 -     0x7fff95e3cfff  libpam.2.dylib (20) <E805398D-9A92-31F8-8005-8DC188BD8B6E> /usr/lib/libpam.2.dylib
    0x7fff962ec000 -     0x7fff96317fff  libc++abi.dylib (125) <88A22A0F-87C6-3002-BFBA-AC0F2808B8B9> /usr/lib/libc++abi.dylib
    0x7fff9666d000 -     0x7fff96695fff  libsystem_info.dylib (459) <B85A85D5-8530-3A93-B0C3-4DEC41F79478> /usr/lib/system/libsystem_info.dylib
    0x7fff96696000 -     0x7fff9669aff7  com.apple.TCC (1.0 - 1) <AFC32F8F-BCD5-313C-B66E-5AB8591EC066> /System/Library/PrivateFrameworks/TCC.framework/Versions/A/TCC
    0x7fff9756f000 -     0x7fff97571fff  com.apple.loginsupport (1.0 - 1) <35A2A071-606C-39A5-8C11-E4CAF98D934C> /System/Library/PrivateFrameworks/login.framework/Versions/A/Frameworks/loginsupport.framework/Versions/A/loginsupport
Sample analysis of process 32427 written to file /dev/stdout
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vjpr commented May 7, 2015

Fixed thanks to: webpack/webpack#701 (comment)

Nuking node_modules/webpack and npm install fixed the problem.

You might need to install fsevents so Chokidar uses it (which is used by watchpack in webpack-dev-server)

@vjpr vjpr closed this as completed May 7, 2015
@MaxSvargal MaxSvargal mentioned this issue Jun 5, 2015
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@DickyT DickyT mentioned this issue Jan 17, 2017
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@hanxue hanxue mentioned this issue Nov 8, 2017
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@sodatea sodatea mentioned this issue Dec 14, 2018
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stefandesu added a commit to gbv/cocoda that referenced this issue May 7, 2019
@stefandesu
Install fsevents to dev dependencies to prevent high CPU usage in dev…
07cbf7c 
… server

See webpack/webpack-dev-server#172
@sammyfilly sammyfilly mentioned this issue Aug 12, 2023
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