sdk/pkg/vm at b453c6bcba5526e127361e5ea45765d12431b996 - sdk

Files

T

Stephen Adams a45efb1555 [vm/lib] Fast path for Map.addAll

When a compact linked hash map is empty, it can add all the entries of
another compact linked hash map by a block-copy.

Adding elements to an empty map occurs with `Map.of(m)` which is
essentially `{}..addAll(m)`.

For AOT it does not make much difference for small maps, but is better
for large maps.

dart-aot-null linux-armv8c
MapCopy.Map.Thing.of.Map.2       3.737%   410.25  395.47
MapCopy.Map.String.of.Map.2      3.858%   400.93  386.03
MapCopy.Map.Thing.of.Map.100   503.4%    2308.06  382.49
MapCopy.Map.String.of.Map.100  543.6%    2297.51  356.96

JIT seems to do well on smaller maps too
dart linux-x64
MapCopy.Map.Thing.of.Map.2      80.22%   2681.76 1488.06
MapCopy.Map.String.of.Map.2     85.56%   2671.52 1439.70
MapCopy.Map.Thing.of.Map.100   777.8%   12859.79 1465.04
MapCopy.Map.String.of.Map.100  867.3%   12829.22 1326.28

Added similar fast path for identity maps, sets, and identity sets.

TEST=existing

Change-Id: Ifa8afc95797bc603113dcc7984c6a6d61af56595
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/222249
Reviewed-by: Dan Field <dnfield@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Stephen Adams <sra@google.com>

2022-01-14 17:35:21 +00:00

bin

[vm/test] Convert vm/cc/IRTest_TypedDataAOT_{NotInlining,Regress43534} to the new IL tests

2022-01-04 15:29:06 +00:00

lib

[vm/aot] Keep toString methods on exception classes in toString transformer

2022-01-13 15:32:50 +00:00

test

[vm] Don't include an isolate in getVM until it has been registered with the service isolate routing.

2022-01-11 18:19:15 +00:00

testcases/transformations

[vm/lib] Fast path for Map.addAll