801350 - Huge performance regression in certain demo when HWA disabled

Status: RESOLVED FIXED

(Core :: Layout, defect)

Description

[Alice0775 White]

Build Identofire:
http://hg.mozilla.org/mozilla-central/rev/90857937b601
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0 ID:20121013030542

I noticed the performance regression when I test Bug 801267.

Steps to reproduce:
  1. Disable HWA ( Tools > Options > Advanced > General > uncheck "Use hardware acceleration when available"
  2. Rrestart browser.

  3. Open http://paperjs.org/examples/meta-balls/
  4. Move mouse in the right pane

Actual results:
  Drawing is extremely slow

Regression window(m-c)
Good:
http://hg.mozilla.org/mozilla-central/rev/b1775e08bb16
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0 ID:20121012032003
Bad:
http://hg.mozilla.org/mozilla-central/rev/83e8792a147a
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0 ID:20121012040504
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=b1775e08bb16&tochange=83e8792a147a


Regression window(m-i)
Good:
http://hg.mozilla.org/integration/mozilla-inbound/rev/cea04d0eb7c9
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0 ID:20121011155703
Bad:
http://hg.mozilla.org/integration/mozilla-inbound/rev/f283941dbf75
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0 ID:20121011163903
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=cea04d0eb7c9&tochange=f283941dbf75

Suspected: Bug 800287 or Bug 795674

Comment 1

[Matt Woodrow (:mattwoodrow)]

Should be fixed by https://hg.mozilla.org/integration/mozilla-inbound/rev/007e3dea2e57, as part of bug 795674.

Comment 2

[Alice0775 White]

I confirmed the problem was fixed in latest m-i.
http://hg.mozilla.org/integration/mozilla-inbound/rev/007e3dea2e57
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/19.0 Firefox/19.0 ID:20121014192607