Reviewers: adamk, rossberg, Yang,
Description:
Fix Promise.resolve/Promise.reject unnecessarily scheduling a microtask.
[email protected],[email protected], [email protected]
LOG=N
Please review this at https://codereview.chromium.org/777703002/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+2, -1 lines):
M src/promise.js
Index: src/promise.js
diff --git a/src/promise.js b/src/promise.js
index
7d5be882f4c1ad161f2816ad70badeef614bcb40..d38cdaa482487e84aaf65f1b021bb457bf48a319
100644
--- a/src/promise.js
+++ b/src/promise.js
@@ -74,7 +74,8 @@ var lastMicrotaskId = 0;
function PromiseDone(promise, status, value, promiseQueue) {
if (GET_PRIVATE(promise, promiseStatus) === 0) {
- PromiseEnqueue(value, GET_PRIVATE(promise, promiseQueue), status);
+ var tasks = GET_PRIVATE(promise, promiseQueue);
+ if (tasks.length) PromiseEnqueue(value, tasks, status);
PromiseSet(promise, status, value);
}
}
--
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