[heap] Avoid iterating all pages when freeing empty buckets
At the end of scavenge, the GC iterates all pages to search for empty buckets and free them. With this CL the scavenger marks buckets (and their corresponding pages) that were empty to reduce work. After finishing scavenging the GC only needs to revisit those marked buckets. Unlike (minor) mark-compact, the scavenger can't directly free those buckets, since the evacuation and pointer updating-phases are not separated. Right now the pages are processed sequentially but this could be parallelized in a subsequent CL. Change-Id: I47ed8c0e952b06c5d960e39a6f38e745d5618656 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1889884 Commit-Queue: Dominik Inführ <dinfuehr@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Cr-Commit-Position: refs/heads/master@{#64781}
Showing
This diff is collapsed.
Please
register
or
sign in
to comment