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Benedikt Meurer authored
This is a preparation for doing a similar change to JSTypedArrays to be able to finally access huge ArrayBuffers with TypedArrays. This CL itself improves the performance of DataViews, sometimes to be even faster than TypedArrays now. On the test case[1] we go from testDataViewGetUint8: 711 ms. testUint8Array: 654 ms. testDataViewGetUint16: 801 ms. testUint16Array: 649 ms. testDataViewGetInt32: 699 ms. testInt32Array: 648 ms. testDataViewGetFloat64: 701 ms. testFloat64Array: 650 ms. to testDataViewGetUint8: 622 ms. testUint8Array: 656 ms. testDataViewGetUint16: 634 ms. testUint16Array: 656 ms. testDataViewGetInt32: 629 ms. testInt32Array: 655 ms. testDataViewGetFloat64: 631 ms. testFloat64Array: 661 ms. so the performance improves by up to **20%**. [1] https://github.com/bmeurer/js-micro-benchmarks/blob/master/bench-dataview.js Tbr: ulan@chromium.org Bug: chromium:225811, v8:4153, v8:8383 Change-Id: Ie4409e2fe96e5085ddcf5eb3f24f3cacfb3afe02 Cq-Include-Trybots: luci.chromium.try:linux-rel,win7-rel Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1601144 Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Reviewed-by: Peter Marshall <petermarshall@chromium.org> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#61464}
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