1272763 - Evaluation in Browser Console/Web Console/Scratch Pad takes a long time. (decrypting with pbkdf2 algorithm).

Status: RESOLVED DUPLICATE of bug 793345

(DevTools :: Console, defect)

Description

[Alice0775 White]

Attachment: Bug1271947.txt

+++ This bug was initially created as a clone of Bug #1271947 +++

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.94 Safari/537.36

Steps to reproduce:
1. Open Browser Console, Web Console or Scratch Pad
2. Paste JavaScript code in the attached file
3. Evaluate the code

Actual Results:
Nightly49 is 9 times slower than Chrome.
And Nightly49 is 2-3 times slower than Firefox38/31.

Browser   : Result
Chrome50  :  851  838  840
Firefox31 : 2740 2813 2783
Firefox38 : 3077 3045 3030
Firefox39 : 4668 4675 4668
Firefox40 : 4318 4334 4246
Firefox41 : 4525 4457 4468
Firefox42 : 5875 5808 5816
Firefox43 : 6249 6076 6124
Firefox44 : 7159 6949 7008
Firefox45 : 6969 6930 6896
Firefox46 : 6727 6613 6658
Firefox47 : 7217 7050 7164
Firefox48 : 7721 7716 7703
Firefox49 : 7900 7888 7884


Expected results:
No so




Actual results:

After Firefox updated from 44 to 45 version, we've got a problem that decryption process takes too long time (about 10 seconds) but under Firefox 44 and below it was about 1 second.


Expected results:

In Firefox 45 and above decryption process should take about 1 second.

Comment 1

[Alice0775 White]

> Actual results:
> 
> After Firefox updated from 44 to 45 version, we've got a problem that decryption process takes
> too long time (about 10 seconds) but under Firefox 44 and below it was about 1 second.
> 
> 
> Expected results:
> 
> In Firefox 45 and above decryption process should take about 1 second.

Oops, paste error. 
Please ignore last 9 lines

Comment 2

[Marcia Knous [:marcia]]

Tracking this regression for 49 as it seems to be a fairly significant performance regression.

ni on bholley - Is this something you would look into or should it be passed on to someone else?

Comment 3

[Brian Grinstead [:bgrins]]

This looks like a dupe of Bug 793345.  I'm not sure what the columns in Comment 0 are representing exactly, but the perf appears to be bouncing around 44-47 if the first column is a measure of time.  The numbers do seem to get gradually worse over time, but even from the start it's 10x slower than the same code running in a script tag so fixing Bug 793345 looks like the most important piece here.

Comment 4

[Liz Henry (:lizzard) (relman/hg->git project)]

This seems less of a sudden regression than something gradually getting worse since 38 or so. I don't think we need to track this.