| commit | c7422d5277fcc58ddc41dc8598fcbaf4571322da | [log] [tgz] |
|---|---|---|
| author | Daco Harkes <dacoharkes@google.com> | Tue Feb 23 12:41:49 2021 +0000 |
| committer | commit-bot@chromium.org <commit-bot@chromium.org> | Tue Feb 23 12:41:49 2021 +0000 |
| tree | 6e3d9072bb1b1cbcfa39bb979cdf0559302fe198 | |
| parent | a8b42efa1a20b3b83d8e40cc885eac2e5a78a1f6 [diff] |
[benchmarks/ffi] Memory access with `asTypedList` Adds benchmarks using `asTypedList` on Pointers to investigate from where it pays of to do construct a TypedData to do memory access instead of on the Pointer directly. x64 JIT results: - Memory access on TypedData (int8) is ~2,5 faster than on Pointer. FfiMemory.PointerInt8(RunTime): 72.23885718413639 us. FfiMemory.PointerInt8TypedDataReuse(RunTime): 28.239710263614928 us. - Constructing the TypedData for 1000 reads + 1000 writes takes ~20% of the total runtime, 400 reads or writes on TypedData, 160 reads or writes on Pointer. FfiMemory.PointerInt8TypedDataNew(RunTime): 34.345480148372026 us. FfiMemory.PointerInt8TypedDataReuse(RunTime): 28.239710263614928 us. x64 AOT results: FfiMemory.PointerInt8(RunTime): 13.862134213116345 us. FfiMemory.PointerInt8TypedDataNew(RunTime): 26.149628021913365 us. FfiMemory.PointerInt8TypedDataReuse(RunTime): 24.73322780505299 us. - Using asTypedList is slower. (Some optimizations fail to kick in.) Change-Id: I401edb88baf3a3c5094ecae808f122adf258da28 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/186289 Reviewed-by: Clement Skau <cskau@google.com> Commit-Queue: Daco Harkes <dacoharkes@google.com>
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