tree 3c9c0f341a751e62d736ca8549773bbb57b6f6e9
parent 188dfbd52b67e1d593c0a96149319aebdb5989f1
author Ryan Macnak <rmacnak@google.com> 1654105948 +0000
committer Commit Bot <commit-bot@chromium.org> 1654105948 +0000

[vm] Represent the slow object copy from_to table with a heap array.

 - Greatly reduces the size of the root set, thus reducing pauses for scavenges or marking that occur during a copy.
 - Reduces the memory overhead of the from_to table from 6 words per object to 2 words per object.

TEST=ci
Change-Id: Icf81f4b25adff22590a9c84c40068e35dd4d502b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/246305
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>