351406 - Poor JavaScript performance on 'divide' and 'concatenate strings' tests.

Status: RESOLVED DUPLICATE of bug 117611

(Core :: JavaScript Engine, defect)

Description

[LeoZ]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060904 Minefield/3.0a1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060904 Minefield/3.0a1

JavaScript test performance is poor in Mozilla based browsers. Especially for 'divide' and 'concatenate strings' operations.

See 'additional information' for details.

Reproducible: Always

Steps to Reproduce:
1. Load http://wd-testnet.world-direct.at/mozilla/dhtml/funo/jsTimeTest.htm page
2. Press 'Run all tests' button.
3. Wait till the tests are executed.
4. See the resulting time.
5. Repeat the same test case for ANY OTHER browser.
6. Compare results.

Actual Results:  
Test result:
Average time is incredibly low and unacceptable for a modern browser.

Expected Results:  
Test result:
Average time is inline or even better than in ANY OTHER browser (IE, Opera, WebKit).

From my blog post: http://leoz.org/blog/?p=11

---------------------------------------------


JavaScript performance test results

Platform:

    * Hardware: IBM ThinkPad T41, Intel Pentium M 1.59 GHz, 512M of RAM
    * OS: MS Windows XP SP2

Test:

    * JavaScript performance test

Browsers:

    * MS Internet Explorer 7, RC, version 7.0.5700.6
    * Firefox-Minefield, version 3.0a1, Mozilla 1.9a1, Gecko/2006090404
    * Flock, version 0.7.4.1, Mozilla 1.8.0.5, Gecko/20060731, Firefox/1.5.0.5
    * Opera 9.01
    * Swift 0.1, WebKit for WIN32

Results:

   1. Opera 9 - 668ms
   2. Swift 0.1 - 781ms
   3. MS IE 7 - 958ms
   4. FF 3.0 - 1386ms
   5. Flock 0.7 - 2379ms

    * Tests were made several times for every browser but the average result is about the one above.

Resume:

    * Opera 9 is a winner.
    * Mozilla 1.8-1.9 is a looser.

Browser notes:

    * Flock browser is based on Firefox, that based on Mozilla.
    * Every Mozilla based browser info contains also correspondent Mozilla and Gecko versions.
    * Swift is a first WebKit based browser for MS Windows.

Comment 1

[LeoZ]

Add timeless & romaxa.

Comment 2

[Erik Fabert]

I believe these are the same tests as in bug 117611, just moved to a new location.

Comment 3

[LeoZ]

Attachment: JavaScript performance test page

This is an actual test case copied from the original URL: http://wd-testnet.world-direct.at/mozilla/dhtml/funo/jsTimeTest.htm

Comment 4

[LeoZ]

'divide', 'divide2', 'concatenate strings' test cases from attachment look really bad.
:-(

Comment 5

[Bob Clary [:bc] (inactive)]

thanks for finding the updated test as the original as linked to in bug 117611 has gone missing. the concatenate issue is already filed as a dependent bug to bug 117611. The other issues may or may not be covered in that bug. If you would please file separate bugs on the issues and make them block bug 117611 that would be great. Duping this to bug 117611 since it has more analysis and proposes investigative approaches.

*** This bug has been marked as a duplicate of 117611 ***

*** This bug has been marked as a duplicate of 117611 ***