454100 - TM: Perf in Thunderbird

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, enhancement, P4)

Description

[Joe Sabash [:JoeS1]]

Thought I would take a look at TM performance gains in Thunderbird.

Method:
       Set the pref javascript.options.jit.content to true
       Use an iframe in a saved message, or set the start page to point to:
       http://www2.webkit.org/perf/sunspider-0.9/sunspider-driver.html
Results:
       About a 35% perf boost with TM enabled.
       Thunderbird crashes, the following breakpad reports.
         7e2efbf3-7cef-11dd-82f0-001cc45a2c28	9/7/2008	11:13 AM
         a70a05fa-7ced-11dd-9010-001a4bd43ef6	9/7/2008	11:00 AM
         5c72fea6-7cdd-11dd-8642-001cc45a2c28	9/7/2008	9:03  AM
It's interesting that the actual results for Thunderbird are significantly
slower that for Firefox 3.1  Not sure why that is the case.

Here is a comparison of results

FF 3.1   Thunderbird
  5821     9702
  5730     9333
  5718     9161

Perhaps it's too early in the dev cycle to test TM in TB
It's interesting to note that no crashes were noted here in FF 3.1
If this report is not helpful, please let me know.

Tests performed with:
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b1pre) Gecko/20080907031916 Shredder/3.0b1pre ID:20080907031916

Comment 1

[Mark Banner (:standard8)]

Just a couple of notes:

- These tests were performed in TB, but crashes appear to relate to core elements only (maybe due to how TB is performing them).
- I expect Thunderbird's slower perf time is probably due to things like not having jemalloc enabled and also potentially other differences in the security policy (?) slowing things down.

Comment 2

[Robert Sayre]

please file specific bugs on crashes