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Issue 46561: On Mac OS Chrome Extensions took triple or quadruple memories than Chrome for Windows
5 people starred this issue and may be notified of changes. Back to list
 
Reported by shunyuan.chou@gmail.com, Jun 15, 2010 
Chrome Version       : 6.0.427.0 dev
URLs (if applicable) : https://mail.google.com/mail/#inbox
Other browsers tested:
Add OK or FAIL after other browsers where you have tested this issue:
     Safari 4: N/A
  Firefox 3.x: N/A
         IE 7: N/A
         IE 8: N/A

What steps will reproduce the problem?
1. Execute Chrome 6.0.427.0 dev on Mac OS
2. Open Gmail
3. Mac OS starts swap and Chrome becomes slow to response user input

What is the expected result?
Chrome should run smoothly without problems since free memory still have about 512 MB

What happens instead?
Mac OS starts swap and Chrome becomes slow to response user input.

Please provide any additional information below. Attach a screenshot if
possible.
I have a MacBook only has 2 GB ram, when I run Chrome on Mac OS, the free memories are about 512 MB. Then I open Gmail, the OS starts to swap, and Chrome become very slow.

By examining the memory usage of Chrome in task manager, I find each Chrome extension will take triple or quadruple memories than it on Windows.

Please check the attached screen shot for detail information.
ExensionMemoryWindows.png
70.8 KB   View   Download
ExtensionMemoryMacOS.png
126 KB   View   Download
Jun 15, 2010
#1 megazzt 
I think someone mentioned that about:memory for mac does not show "shared" memory as it does for Windows.  It is possible Mac apps are unable to query that statistic or (less likely) the OS does not support it.  Someone on the Chrome team would know for sure.

The former would cause the increased figures you see to be an illusion, while the latter would make it a real problem.  It's possible you could figure it out by keeping an eye on free real and virtual memory while starting/stopping extensions and seeing if the change matches the total memory the extension uses or if it's less less.
Jun 15, 2010
#2 shunyuan.chou@gmail.com 
I use Activity Monitor to examine the Chrome memory usage on Mac OS X 10.6.3, and then use Process Explorer to do it again on Windows. The result is the same.

And I really got OS swap when I use Chrome for Mac to open Gmail only with 512 MB free system RAM.
Jun 29, 2010
#3 erik...@chromium.org 
(No comment was entered for this change.)
Status: Assigned
Owner: andyb...@chromium.org
Cc: pinker...@chromium.org
Labels: -Area-Undefined Area-Internals Feature-Extensions OS-Mac
Jul 2, 2010
#4 andyb...@chromium.org 
Could you post screenshots of about:memory in both those cases? That would be extremely helpful.

Thanks :)
Cc: viettrun...@chromium.org
Jul 2, 2010
#5 viettrun...@chromium.org 
(No comment was entered for this change.)
Cc: tha...@chromium.org
Jul 2, 2010
#6 shunyuan.chou@gmail.com 
I already did, check previous attached files.
Jul 2, 2010
#7 shunyuan.chou@gmail.com 
Hi, I add the screen shots  of about memory for Mac and Vista
about_memory_mac.png
94.9 KB   View   Download
about_memory_windows.png
45.8 KB   View   Download
Jul 7, 2010
#8 andyb...@chromium.org 
 Issue 48329  has been merged into this issue.
Mar 10, 2013
#9 bugdroid1@chromium.org 
(No comment was entered for this change.)
Labels: -Area-Internals -Feature-Extensions Cr-Internals Cr-Platform-Extensions
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