FreeCAD freezes for a long period if STL is very big

[ceremcem]

While moving and rotating parts, FreeCAD window freezes for at least 30 seconds. I'm running 0.7-AppImage on Debian 64bit. At the freezing moment, last strace output is as follows:

stat("/tmp/.mount_FreeCADiw2fU/usr/lib/freecad-daily/Ext/freecad/asm3/mover", 0x7ffeb871dd50) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/tmp/.mount_FreeCADiw2fU/usr/lib/freecad-daily/Ext/freecad/asm3/mover.x86_64-linux-gnu.so", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/tmp/.mount_FreeCADiw2fU/usr/lib/freecad-daily/Ext/freecad/asm3/mover.so", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/tmp/.mount_FreeCADiw2fU/usr/lib/freecad-daily/Ext/freecad/asm3/movermodule.so", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/tmp/.mount_FreeCADiw2fU/usr/lib/freecad-daily/Ext/freecad/asm3/mover.py", O_RDONLY) = 13
fstat(13, {st_mode=S_IFREG|0664, st_size=14829, ...}) = 0
openat(AT_FDCWD, "/tmp/.mount_FreeCADiw2fU/usr/lib/freecad-daily/Ext/freecad/asm3/mover.pyc", O_RDONLY) = -1 ENOENT (No such file or directory)
fstat(13, {st_mode=S_IFREG|0664, st_size=14829, ...}) = 0
read(13, "import math\nfrom collections imp"..., 8192) = 8192
read(13, "   assembly = info.Parent.getLin"..., 8192) = 6637
read(13, "", 8192)                      = 0
close(13)                               = 0
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
poll([{fd=7, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=7, revents=POLLOUT}])
writev(7, [{iov_base="\1\30\v\0\366\1\200\4\26\1\200\4\0\0\0\0d\0\36\0\0\0\1\0\371\0\0\0\n \0\0"..., iov_len=152}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 152
poll([{fd=7, events=POLLIN}], 1, -1)    = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\335?\22\0\0\0008\1\0\0\211\n\256\0\22\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 104
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=7, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=7, revents=POLLOUT}])
writev(7, [{iov_base="\24\0\6\0\211\n\256\0\371\1\0\0\6\0\0\0\0\0\0\0\1\0\0\0", iov_len=24}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 24
poll([{fd=7, events=POLLIN}], 1, -1)    = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\336?\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=7, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=7, revents=POLLOUT}])
writev(7, [{iov_base="\17\0\2\0\211\n\256\0", iov_len=8}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 8
poll([{fd=7, events=POLLIN}], 1, -1)    = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\337?\20\0\0\0008\1\0\0008\1\0\0\20\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 96
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=7, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=7, revents=POLLOUT}])
writev(7, [{iov_base="(\0\4\0\26\1\200\4\211\n\256\0\0\0\0\0", iov_len=16}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 16
poll([{fd=7, events=POLLIN}], 1, -1)    = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\1\340?\0\0\0\0\26\1\200\4\0\0\23\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=7, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=7, revents=POLLOUT}])
writev(7, [{iov_base="\3\0\2\0\211\n\256\0\16\n\2\0\211\n\256\0", iov_len=16}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 16
poll([{fd=7, events=POLLIN}], 1, -1)    = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\341?\3\0\0\0A\0\0\0\1\0\n\n\377\377\377\377\0\0\0\0\0\0\2\0@\0\0\0"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 76
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=7, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=7, revents=POLLOUT}])
writev(7, [{iov_base="\22\0\30\0\26\1\200\4(\0\0\0)\0\0\0 \0\0\0\22\0\0\0\37\2\0\0\0\0\0\0"..., iov_len=120}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 120
poll([{fd=7, events=POLLIN}], 1, -1)    = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\34\0\343?\26\1\200\4(\0\0\0\211\270\33\5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 84
recvmsg(7, {msg_namelen=0}, 0)          = -1 EAGAIN (Resource temporarily unavailable)
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8
write(4, "\1\0\0\0\0\0\0\0", 8)         = 8

[realthunder]

Which mover did you use? Is this problem happening consistently or just occasionally?

Also, please provide more logging information by typing the following commands in Python console

App.setLogLevel('asm',4)
App.setLogLevel('asm.main',4)

Then open the report view (View->Panels->Report View). Do the moving operation, and after it unfreezes. Right click the report view and select save log, and attach the log file here. Thanks!

[ceremcem]

It freezes consistently.

This time I even didn't need to move anything. Just opened the last saved file, clicked to rotate, then it freezed.

I set the variables in the Python console, then tried to rotate (not move) the model and it freezed. After freeze, no additional logs are generated:

Here is the freeze in action:

It turns out that it's not related with moving parts, it seems to be related with a specific part in the design which has lots of details:

[realthunder]

Ah, I see. Yes, there is a known inefficiency in selection handling of object with lots of faces/edges. It has been improved. Please wait for the next release, probably early next week.

[ceremcem]

Wow, great news! Thanks! (I think I can find a low detailed model for now, it doesn't have to be that drawing.)

[realthunder]

Forget to say. Meanwhile, to work around this problem, just avoid select the object in tree view directly. Select in 3D view, instead, which only selects a sub-element. Most of operation in asm3 actually requires you to select element instead of the whole object.

[ceremcem]

It seems that this is resolved by https://github.com/realthunder/FreeCAD_assembly3/releases/tag/0.8.0 Thanks!