1edb46cc04
This improves the general Array constructor call performance (w/o usable AllocationSite feedback) in TurboFan by ~2x, i.e. for example invoking the Array constructor like this var a = Array.call(undefined, n); instead of var a = Array(n); such that the CallIC doesn't know that it's eventually calling the Array constructor. It also thus changes the single argument Array constructor to always return holey arrays. Previously the single argument case for the Array constructor was somehow trying to dynamically detect 0 and in that case returned a packed array instead of a holey one. That adds quite a lot of churn, and doesn't seem to be very useful, especially since this might lead to unnecessary feedback pollution later. R=mvstanton@chromium.org Bug: v8:2229, v8:5269, v8:6399 Change-Id: I3d7cb9bd975ec0e491e3cdbcf1230185cfd1e3de Reviewed-on: https://chromium-review.googlesource.com/565721 Reviewed-by: Michael Stanton <mvstanton@chromium.org> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#46538} |
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benchmarks | ||
cctest | ||
common | ||
debugger | ||
fuzzer | ||
inspector | ||
intl | ||
js-perf-test | ||
memory | ||
message | ||
mjsunit | ||
mkgrokdump | ||
mozilla | ||
preparser | ||
promises-aplus | ||
test262 | ||
unittests | ||
wasm-spec-tests | ||
webkit | ||
bot_default.gyp | ||
bot_default.isolate | ||
BUILD.gn | ||
default.gyp | ||
default.isolate | ||
optimize_for_size.gyp | ||
optimize_for_size.isolate | ||
perf.gyp | ||
perf.isolate |