Zaid Abdulla
1e41c72d60
Bundling code now with Rollup for its flat bundling and tree shaking support. Front end code still goes through Webpack for browser support.
46 lines
1.0 KiB
JavaScript
46 lines
1.0 KiB
JavaScript
"use strict";
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let cache1 = new Map();
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let cache2 = new Map();
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const keys = new WeakMap();
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function getKey(obj) {
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if (obj === null) return "null";
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else if (obj === undefined) return "undefined";
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const t = typeof obj;
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if (t === "number" || t === "boolean" || t === "string") return `${t}:${obj}`;
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if (t !== "function" && t !== "object")
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throw new Error(`Cannot memoize ${t} arguments`);
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let k = keys.get(obj);
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if (!k) {
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const rnd = Math.trunc(Math.random() * Number.MAX_SAFE_INTEGER);
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k = `${t}:${rnd.toString(36)}`;
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keys.set(obj, k);
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}
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return k;
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}
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export default function memoize(func) {
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return (...args) => {
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const key = JSON.stringify(args.map(getKey)) + getKey(func);
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if (cache1.has(key)) return cache1.get(key);
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let r;
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if (cache2.has(key)) r = cache2.get(key);
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else r = func(...args);
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cache1.set(key, r);
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return r;
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};
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}
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const interval = setInterval(() => {
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cache2 = cache1;
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cache1 = new Map();
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}, 120000);
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// Don't hold Node.js process
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if (interval.unref) interval.unref();
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