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webpack/lib/util/objectToMap.js

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format existing code
2018-07-30 23:08:51 +08:00
/*
MIT License http://www.opensource.org/licenses/mit-license.php
*/
"use strict";
perf: refactor various timestamp caches into ES6 Maps This change satisfies https://github.com/webpack/webpack/issues/6234 which desires to change the timestamp caches from plain objects to the ES6 Map type to avoid deopts, since v8 expects things to be added to Maps but objects are only fast if properties aren't added dynamically after initial assignment.
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/**
Simplify objectToMap by using Object.entries
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* Convert an object into an ES6 map
chore: fix `any` types
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* @template {object} T
* @param {T} obj any object type that works with Object.entries()
* @returns {Map<string, T[keyof T]>} an ES6 Map of KV pairs
perf: refactor various timestamp caches into ES6 Maps This change satisfies https://github.com/webpack/webpack/issues/6234 which desires to change the timestamp caches from plain objects to the ES6 Map type to avoid deopts, since v8 expects things to be added to Maps but objects are only fast if properties aren't added dynamically after initial assignment.
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*/
module.exports = function objectToMap(obj) {
Simplify objectToMap by using Object.entries
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return new Map(Object.entries(obj));
perf: refactor various timestamp caches into ES6 Maps This change satisfies https://github.com/webpack/webpack/issues/6234 which desires to change the timestamp caches from plain objects to the ES6 Map type to avoid deopts, since v8 expects things to be added to Maps but objects are only fast if properties aren't added dynamically after initial assignment.
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};