ajaxorg/cloud9 — pull request #2399 by nightwing (2012-11-03 17:13:01+00:00)
Title: [Liskov] Ace paint perf

https://github.com/ajaxorg/cloud9infra/issues/3058
ace slowness was because very long paint times (20-30ms on my machine)
it was caused by zen-button having opacity 0.01 instead of 0
and transparent backgrounds/gradients on ace parent elements

together with apf pr this reduces paint times to 8ms
giving ~60 fps on chrome devtools timeline

@ajaxorg/liskov @vladzinculescu