596321 - "Biolab Disaster" slow since 20100816

Status: RESOLVED DUPLICATE of bug 595655

(Core :: Graphics, defect)

Description

[Dorus Peelen]

User-Agent:       Mozilla/5.0 (Windows NT 6.0; rv:2.0b4pre) Gecko/20100816 Minefield/4.0b4pre
Build Identifier: Mozilla/5.0 (Windows NT 6.0; rv:2.0b4pre) Gecko/20100816 Minefield/4.0b4pre

I noticed that thrunk builds are a lot slower on the biolab game then Firefox 3.6.9 is. Regression hunting shows the 20100816 nightly is the first that shows this huge slowdown (the game feels twice as slow).

Later nighlies are slighly faster again, but do not get near the speed of firefox 3.6.9.

Reproducible: Always

Steps to Reproduce:
1. Start Bioloab (see url).
2. Walk to the right till the first checkpoint.
3. Shoot as fast as possible.
Actual Results:  
Notice game is 'bumpy' and bullets are only 1 bullet length apart.

Expected Results:  
Bullets are 1 inch apart and game feels smooth.

Comment 1

[David Mandelin [:dmandelin]]

Bug behavior confirmed on Win7 x86 build.

I don't see any JS in the regression range (8/15-8/16 in http://hg.mozilla.org/mozilla-central/pushloghtml?startdate=8%2F14%2F2010&enddate=8%2F16%2F2010). Looks like gfx is the most likely cause.

Comment 2

[José Jeria]

Build ID: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20100914 Firefox/4.0b7pre

The slowdown only occurrs when I have hardware acceleration (HA) enabled. Without HA its very fast.

Comment 3

[Csaba Kozák [:WonderCsabo]]

Confirmed. If i set mozilla.widget.render-mode to 0, the game will be fast.

A hardware acceleration dev should look into this.

Comment 4

[Csaba Kozák [:WonderCsabo]]

There is a similiar bug here.

https://bugzilla.mozilla.org/show_bug.cgi?id=595655

Comment 5

[Dorus Peelen]

Same regression range on bug 595655.

I'm going ahead on mark this duplicate.