Adblock Plus and (a little) more

Overview for Mozilla's add-on performance measurements · 2011-04-11 16:55 by Wladimir Palant

I got tired of digging through logs so I created an overview page for AMO’s add-on performance testing results. This shows both the absolute slowdown values as well as percentages for each operating system, along with a link to the corresponding logs. It also shows the standard deviation for each test and flags results that are affected by issues known so far. This week this means:

  • 9 add-ons that weren’t tested because of being platform-dependent (bug 648225)
  • 2 add-ons (Google Toolbar and Memory Fox) weren’t tested because they have no stable version for download on
  • 1 add-on (Tab Mix Plus) wasn’t tested because Talos couldn’t understand its install.rdf file (bug 648978)
  • 4 add-ons where some of the tests timed out, typically because of first-run pages that couldn’t be closed (bug 648222)
  • 6 add-ons that were tested disabled because of not being compatible with Firefox (typically Thunderbird add-ons)
  • 30 add-ons that were tested disabled because of not being explicitly compatible with Firefox 4 (bug 648229)
  • 11 add-ons with test results probably considerably skewed by bug 648734 if I count correctly (standard deviation above 10% of the total Firefox start-up time). A lot more results were marked with a warning because of standard deviation above 2% of the total Firefox start-up time but I won’t count those.
  • Almost every add-on has its Windows results skewed by bug 647954. This apparently works in both directions, for some add-ons the Windows score has been increased due to errors, others got an advantage because their initialization didn’t run.

I guess I will have to re-run that script weekly until AMO fixes the bugs and starts providing affected add-on authors with useful information.


Comment [5]

  1. Thomas Stache · 2011-04-11 18:21 · #

    Good stuff! I think this is great work from your side, that I’d like to be valued a bit more by the AMO people, than Jorge demonstrated here in the comments…
    Keep it up!

  2. Stellan Klebom · 2011-04-11 18:47 · #

    Very good information!

    Indeed is the percentage slowed down very misleading to the degree of being almost meaningless. I’m glad you are as thorough Wladimir.

    However I have a startup time well above 10s for my firefox due to a large amount of addons (61 enabled + 11 disabled + 20 plugins). If these measurements contribute to shortening this rather large startup time I’ll be a little bit happy…

  3. Dan · 2011-04-11 19:42 · #

    Great stuff, very detailed.

    You’re doing someone’s job for them. I hope they’re embarrassed.

  4. Dave Garrett · 2011-04-11 23:35 · #

    Wow, you’ve done a lot of work here. Thanks immensely for digging into this!

  5. pd · 2011-04-12 13:40 · #

    This is brilliant stuff. It’s exactly what we should be seeing on AMO somewhere. Just one tweak: what do the background colours (pink, yellow) indicate? Small key or legend would be ace :)pd

    Reply from Wladimir Palant:

    There are tooltips explaining what these colors indicate.

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