716367 - [HWA] Firefox slowdown on borders and floats

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Paweł Lewicki]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1
Build ID: 20111220165912

Steps to reproduce:

We've tried to show on mouse hover previews of items listed in tables (graphic files preview). 


Actual results:

We've encountered strange slowdowns on Firefox 9.0.1. After some time we've found out, that it is caused by borders. Later we've read about similar problem on bugzilla (bug 454203). It seems that floats also may be problematic for Firefox.

Link to the code with test could be found here:
https://gist.github.com/1578087

"Hints"/"Popups" (absolutely positioned spans) showing under mouse cursor slow down a lot on Firefox. Just add few columns, enable borders and/or float and watch Firefox crawl :(.





Expected results:

Firefox should behave here like Chrome, Opera and IE 9 - smooth and without slowdown.

Comment 1

[Tim (fmdeveloper)]

Attachment: Reporter's test case

Comment 2

[Tim (fmdeveloper)]

WFM on Mozilla/5.0 (Windows NT 5.1; rv:13.0a1) Gecko/20120212 Firefox/13.0a1 ID:20120212031149

I tried various combinations of the options at the top, including all and none selected and could not reproduce.

Does the issue still occur if you start Firefox in Safe Mode? http://support.mozilla.com/en-US/kb/Safe+Mode

How about with a new, empty profile? http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_8-make-a-new-profile

Can you capture the contents of about:memory when you experience the performance issue?

Comment 3

[Paweł Lewicki]

Here is some results of my investigation:
- Safe Mode - Everything is OK - no slowdown,
- Normal mode but all add-ons disables - I still have slowdown,
- Normal mode - I still have slowdown,
- Empty profile - I still have slowdown.

Comment 4

[Tim (fmdeveloper)]

That sounds like HWA is causing you issues. Please post the contents of the graphics section from about:suppport

Comment 5

[Paweł Lewicki]

Informations from about:support

Grafika

Opis adaptera
        Intel(R) HD Graphics Family

ID dostawcy
        8086

ID urządzenia
        0126

RAM adaptera
        Unknown

Sterowniki adaptera
        igdumd64 igd10umd64 igd10umd64 igdumdx32 igd10umd32 igd10umd32

Wersja sterownika
        8.15.10.2418

Data sterownika
        6-10-2011

Opis adaptera (GPU #2)
        NVIDIA NVS 4200M

ID dostawcy (GPU #2)
        10de

ID urządzenia (GPU #2)
        1056

RAM adaptera (GPU #2)
        512

Sterowniki adaptera (GPU #2)
        nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um

Wersja sterownika (GPU #2)
        8.17.12.6883

Data sterownika (GPU #2)
        6-5-2011

Właczone Direct2D
        true

Właczone DirectWrite
        true (6.1.7601.17563)

Parametry ClearType
        Not found parameters of ClearType

Renderer WebGL
        Blocked for installed graphic card - problems with drivers.

Okna ze sprzętowym przyspieszeniem grafiki
        1/1 Direct3D 10

Comment 6

[Tim (fmdeveloper)]

Please disable HWA, restart Firefox, and see if that solves the speed issue.

Tools -> Options -> Advanced -> General -> Uncheck 'Use hardware acceleration when available' and restart

Comment 7

[Paweł Lewicki]

You are right - problem disappeared after disabling HWA.

Comment 8

[Gregory Pappas [:gregp]]

Unable to reproduce in current versions.