778966 - Use a callback to decide when to end an incremental GC slice

Status: RESOLVED INACTIVE

(Core :: JavaScript Engine, defect)

Description

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

Right now GC slices run for a fixed period of time, usually 10ms (although the time changes if we're in "high frequency mode"). This is kind of arbitrary.

In some cases, we want to be able to end a slice in certain circumstances, such as an event arriving or the vertical retrace finishing. The JS engine could provide a callback that would be called occasionally to decide whether the GC slice should end. The browser could implement it to check for these outside events.