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Last Comment Bug 648793 - Test results for Download Statusbar on OS X are unrealistically low
: Test results for Download Statusbar on OS X are unrealistically low
Product: Testing
Classification: Components
Component: Talos (show other bugs)
: unspecified
: x86 Mac OS X
: -- normal (vote)
: ---
Assigned To: Nobody; OK to take it and work on it
Depends on:
Blocks: 599169 AddonSlowStartup
  Show dependency treegraph
Reported: 2011-04-09 16:30 PDT by Wladimir Palant
Modified: 2012-04-09 00:05 PDT (History)
8 users (show)
See Also:
Crash Signature:
QA Whiteboard:
Iteration: ---
Points: ---


Description Wladimir Palant 2011-04-09 16:30:38 PDT
Talos tests show that Download Statusbar adds 80-100ms to the Firefox startup time on Windows and Linux. Yet on Mac OS X it is supposed to be only 10ms. This is both in the March 26th test run and April 2nd, for the latter the result was still a 10ms increase if you ignore the two outliers. This extension has no OS X specific code path or anything like that, it isn't a fluke either (same result in two test runs). However, this result cannot be correct, Download Statusbar is probably being tested in a non-functional state on OS X.
Comment 1 Jorge Villalobos [:jorgev] 2011-04-11 14:55:10 PDT
I think this is INVALID. My previous tests on Mac OS produced an overhead of around 4% (average 18ms delta, tested on beta 10), and I just performed the same tests and the result was around 6% (30ms average delta, tested on 4.0). I have confirmed the add-on was properly installed and it is fully functional.
Comment 2 Wladimir Palant 2011-04-12 01:22:39 PDT
If that's INVALID then we have a Firefox bug on non-Mac operating systems. All the more reason to investigate what exactly is causing overhead on Windows/Linux and why the same overhead isn't present on OS X. As I said, this extension behaves exactly the same regardless of operating system. My own tests with Download Statusbar on Windows 7 confirmed that its measured Windows overhead is realistic. I got somewhat lower numbers but that's probably due to bug 647954 and bug 648732 (I had both fixed locally).

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