Peter Marshall c7c0e110f5 [typedarray] Use fast path for Float32Array.from(float_64_array) and similar ... Currently, because the source float_64_array has an iterator, it hits the code in the "check_iterator" section of TypedArrayFrom which calls IterableToList. This builds a temporary PACKED_ELEMENTS array (and boxes all of the numeric values as HeapNumbers), then uses this as the source array. This patch checks if the source array is a TypedArray, and if the iterator is the built-in one (where we know the iterator's behaviour). If both are true then it bypasses the creation of this temporary array and uses the original TypedArray as the source. This allows it to take advantage of the existing fast code for copying one typed array to another. R=hablich@chromium.org, petermarshall@chromium.org Bug: chromium:884671 Change-Id: I19a944c9d6d5d07699c7dc3ad7196fc871200b62 Reviewed-on: https://chromium-review.googlesource.com/c/1297312 Reviewed-by: Peter Marshall <petermarshall@chromium.org> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Commit-Queue: Peter Marshall <petermarshall@chromium.org> Cr-Commit-Position: refs/heads/master@{#57022}		2018-10-26 09:47:46 +00:00
..
benchmarks	[test] Share resource-fetching logic with all d8 test cases	2018-08-29 17:51:43 +00:00
cctest	[cpu-profiler] Enable Issue1398 test which has been fixed	2018-10-26 08:34:53 +00:00
common	[wasm] Use getter for WasmResult::value	2018-10-19 14:32:02 +00:00
debugger	[test] Skip slow tests on arm simulators	2018-10-17 08:52:47 +00:00
fuzzer	[wasm][fuzzer] Enforce input size limit	2018-10-25 15:57:29 +00:00
inspector	[tools] Move path-specific try-builders to the CQ config	2018-10-24 13:52:21 +00:00
intl	[Intl] Add "position" to the return of next()	2018-10-24 18:25:41 +00:00
js-perf-test	Extend Array.from micro-benchmarks.	2018-10-24 14:17:51 +00:00
memory	[snapshot] Add tracking for read-only snapshot size.	2018-10-23 13:34:13 +00:00
message	[parser] Token-range-check for callable identifier tokens	2018-10-17 10:21:44 +00:00
mjsunit	[typedarray] Use fast path for Float32Array.from(float_64_array) and similar	2018-10-26 09:47:46 +00:00
mkgrokdump	[cleanup] Cleanup IMMORTAL_IMMOVABLE_ROOT_LIST	2018-10-09 09:05:37 +00:00
mozilla	[test] Add more test suites to Android testing	2018-09-07 09:53:15 +00:00
preparser	[test] Share resource-fetching logic with all d8 test cases	2018-08-29 17:51:43 +00:00
test262	[d8] only add arguments object if arguments are provided	2018-10-23 11:46:53 +00:00
torque	[torque] add test for loop that only exits from the middle	2018-10-24 10:05:42 +00:00
unittests	[wasm] Store WasmEngine in NativeModule	2018-10-25 14:18:01 +00:00
wasm-js	Reland "[wasm] Add a new wasm-js testsuite to run js-api tests"	2018-10-18 20:18:55 +00:00
wasm-spec-tests	[wasm] Update wasm spec tests	2018-10-23 08:57:08 +00:00
webkit	[class] Ship instance and static public class fields	2018-10-18 18:14:52 +00:00
BUILD.gn	Reland "[wasm] Add a new wasm-js testsuite to run js-api tests"	2018-10-18 20:18:55 +00:00