Too much memory usage compared to Chrome and Firefox

[Jinwoo-Song]

Servo is showing high memory usage compared to Chrome and Firefox.
I used 'smem' on Linux and loaded 'www.naver.com' site.

./mach run --release http://www.naver.com

  PID User     Command                                    Swap      USS      PSS      RSS
 4073 jinwoo   /opt/google/chrome/nacl_hel         0          1848     1899       3804 
 4170 jinwoo   /opt/google/chrome/chrome -        0            488     4886       9636 
 4068 jinwoo   /opt/google/chrome/chrome -        0          4504     9839     28912 
 4152 jinwoo   /opt/google/chrome/chrome -        0           748    10347     31136 
 4049 jinwoo   /opt/google/chrome/chrome          0       82564    95359   128716
27456 jinwoo   /usr/lib/firefox/firefox                     0   197512   200816    216744 
10312 jinwoo   components/servo/target/rel        0    406112   408359    416616

[Manishearth]

I think there's a known leak, but I forgot if it was fixed. cc @metajack @nnethercote

(Can't find the issue)

[jdm]

Calling this a leak with no other information is jumping to conclusions. @Jinwoo-Song what is some sample output when running with the memory profiler enabled, using -m 5?

[metajack]

@Manishearth there is a huge mem spike on crashes, but I squashed the big leak we knew about.

[Jinwoo-Song]

Memory profiling log.

Begin memory reports
|
|    0.09 MiB -- pages
|       0.00 MiB -- url(about:blank)
|          0.00 MiB -- display-list 3
|       0.00 MiB -- url(http://castbox.shopping.naver.com/shopAdBox.nhn)
|          0.00 MiB -- display-list
|       0.01 MiB -- url(http://static.nid.naver.com/login.nhn?svc=www1501&url=http%3A%2F%2Fwww.naver.com&t=20150206)
|          0.01 MiB -- display-list
|       0.00 MiB -- url(http://nv.ad.naver.com/adshow?unit=002AT&da_dom_id=ad_timesquare)
|          0.00 MiB -- display-list
|       0.00 MiB -- url(http://nv2.ad.naver.com/adshow?unit=002AP&nrefreshx=0)
|          0.00 MiB -- display-list
|       0.08 MiB -- url(http://www.naver.com/)
|          0.08 MiB -- display-list
|       0.00 MiB -- url(http://nv1.ad.naver.com/adshow?unit=002AN&nrefreshx=0)
|          0.00 MiB -- display-list
|
|  370.02 MiB -- resident-according-to-smaps
|     324.76 MiB -- anonymous (rw-p)
|      18.73 MiB -- other
|      11.09 MiB -- /home/jinwoo/opensource/servo/components/servo/target/release/servo (r-xp)
|       4.70 MiB -- [heap](rw-p)
|       3.39 MiB -- /usr/lib/x86_64-linux-gnu/libLLVM-3.4.so.1 (r-xp)
|       2.12 MiB -- /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so (r-xp)
|       2.00 MiB -- anonymous (rwxp)
|       1.55 MiB -- /usr/lib/x86_64-linux-gnu/libLLVM-3.4.so.1 (r--p)
|       0.93 MiB -- /home/jinwoo/opensource/servo/components/servo/target/release/servo (r--p)
|       0.74 MiB -- /lib/x86_64-linux-gnu/libc-2.19.so (r-xp)
|
|   96.42 MiB -- jemalloc-heap-active
|   73.74 MiB -- jemalloc-heap-allocated
|  168.00 MiB -- jemalloc-heap-mapped
|  362.22 MiB -- resident
|   85.95 MiB -- system-heap-allocated
| 4904.19 MiB -- vsize
|
End memory reports

[Jinwoo-Song]

cc @yichoi

[Jinwoo-Song]

On Mac, Servo shows least memory usage for the same site. It seems that there are some issues on Linux platform.

I estimated the memory with 'Activity Monitor' memory tap on Mac.

• Chrome: 206.2MB (Google Chrome, Google Chrome Helper x3)
• Firefox: 202.5 MB
• Servo: 148.7 MB

[emilio]

Maybe related with this: servo/rust-layers#157

[nox]

Does this still happen?

[jdm]

Memory usage looks fine on Mac like #5892 (comment); someone should check what it is on Linux.

[mikolajpp]

I can do some testing. I will test it with smem on latest later this day.