ef8c18613a
This is a reland of 21c0d77e15
Original change's description:
> [async] Optimize await and AsyncFromSyncIterator
>
> Simplify the promise wrapping in await and
> %AsyncFromSyncIteratorPrototype%.next/return/throw to reuse the PromiseResolve
> primitive. Now await takes 1 tick instead of 3 on the microtask queue.
>
> Change-Id: I7e99b8689eb8fcb09c48915b11c1e06684dc0f1a
> Reviewed-on: https://chromium-review.googlesource.com/1090272
> Commit-Queue: Maya Lekova <mslekova@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Mathias Bynens <mathias@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53853}
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ifa5b2fb8b2fb84b635b2dc1b6455d6aaf154cbfd
Reviewed-on: https://chromium-review.googlesource.com/1106977
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53900}
32 lines
629 B
JavaScript
32 lines
629 B
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Flags: --allow-natives-syntax
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var list = [];
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function log(item) { list.push(item); }
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async function f() {
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try {
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let namespace = await import(/a/);
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} catch(e) {
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log(1);
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}
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}
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f();
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async function importUndefined() {
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try {
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await import({ get toString() { return undefined; }})
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} catch(e) {
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log(2);
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}
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}
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function g() {
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let namespace = Promise.resolve().then(importUndefined);
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}
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g();
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%RunMicrotasks();
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assertEquals(list, [1,2]);
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