55733 2011-03-03 17:22:56 -0800 DrawingAreaProxyImpl should decide how frequently to throw away its backing store based on how expensive painting is 2017-05-26 10:21:14 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) All All RESOLVED WONTFIX InRadar P2 Normal --- 51262 1 aroben webkit-unassigned andersca ggaren oldest_to_newest 362115 0 aroben 2011-03-03 17:22:56 -0800 From bug 51262 comment 9: > 1. Begin with a timer interval of 5s. > 2. After throwing away a backing store, record the time interval required for the next paint. > 3. Update the timer interval to 100 * the recorded time interval in 2. > > For fast-painting sites, this will throw backing stores away quickly. For slow-painting sites, this will approximate a maximum thrash cost of 1%. We should do this! Right now we always throw away after 5s. Note some of the complexity in defining "the time interval required for the next paint" mentioned in bug 51262 comment 41. 362132 1 aroben 2011-03-03 17:39:27 -0800 <rdar://problem/9084989> 1313171 2 andersca 2017-05-26 10:21:14 -0700 We don't use DrawingAreaProxyImpl anymore.