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In order to better match the browser behaviour, run nextTicks (and subsequently the microtask queue) after each individual Timer and Immediate, rather than after the whole list is processed. The current behaviour is somewhat of a performance micro-optimization and also partly dictated by how timer handles were implemented. PR-URL: https://github.com/nodejs/node/pull/22842 Fixes: https://github.com/nodejs/node/issues/22257 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
58 lines
1.9 KiB
JavaScript
58 lines
1.9 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'use strict';
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require('../common');
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const assert = require('assert');
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// setImmediate should run clear its queued cbs once per event loop turn
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// but immediates queued while processing the current queue should happen
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// on the next turn of the event loop.
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// hit should be the exact same size of QUEUE, if we're letting things
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// recursively add to the immediate QUEUE hit will be > QUEUE
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let ticked = false;
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let hit = 0;
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const QUEUE = 10;
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function run() {
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if (hit === 0) {
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setTimeout(() => { ticked = true; }, 1);
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const now = Date.now();
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while (Date.now() - now < 2);
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}
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if (ticked) return;
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hit += 1;
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setImmediate(run);
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}
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for (let i = 0; i < QUEUE; i++)
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setImmediate(run);
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process.on('exit', function() {
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console.log('hit', hit);
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assert.strictEqual(hit, QUEUE);
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});
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