|author||Alexander Markov <email@example.com>||Fri Dec 10 15:00:51 2021 +0000|
|committer||Commit Bot <firstname.lastname@example.org>||Fri Dec 10 15:00:51 2021 +0000|
[vm/aot/tfa] Use RTA to improve AOT compilation speed This change introduces Rapid Type Analysis (RTA) and uses it to calculate initial set of allocated classes for Type Flow Analysis (TFA). As a result, TFA converges much faster and AOT compilation time improves. RTA is less precise than TFA, so the set of allocated classes is larger compared to the one calculated by TFA. However, it has only marginal effect on the size of resulting AOT snapshots. Time of AOT compilation step 2 on a large Flutter application 118.652s -> 59.907s (-49.5% / improved by a factor of 1.98x) Snapshot size on armv8: -0.13% Flutter gallery snapshot size in release and release-sizeopt modes armv7 +0.19%, armv8 +0.2% Just in case, RTA can be disabled using --no-rta option. TEST=ci Issue: https://github.com/dart-lang/sdk/issues/42442 Issue: b/154155290 Change-Id: Iffbdabe7d486cad2e138f7592bffcb70474ddc34 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/222500 Reviewed-by: Ryan Macnak <email@example.com> Reviewed-by: Martin Kustermann <firstname.lastname@example.org> Commit-Queue: Alexander Markov <email@example.com> Reviewed-by: Slava Egorov <firstname.lastname@example.org>
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