When computing time out deadlines for IPC messages, the time granularities (on the order of hundreds of ms) are many, many orders of magnitude greater than the granularity of ApproximateTime; this makes it much cheaper to use ApproximateTime instead of MonotonicTime when computing these deadlines, which significantly improves performance in the case where we're streaming high volumes of IPC messages.
Created attachment 440383 [details] For EWS
Committed r283678 (242616@main): <https://commits.webkit.org/242616@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 440383 [details].
<rdar://problem/83957089>