Currently we accelerate canvas rendering for canvas sizes > 128 * 128 . While we are working on resolving path rendering perf issues, we should bump up that number to 256 * 256 to avoid slowdowns with small-ish canvas' (e.g. the ones used by Google Maps API V3).
Created attachment 130462 [details] Patch
Comment on attachment 130462 [details] Patch OK. r=me
Committed r109973: <http://trac.webkit.org/changeset/109973>