Zaid Abdulla
c2d13e8364
This is in order to be able to support UPPER() and LOWER() functions in queries which are needed for case-insensitive search.
30 lines
538 B
JavaScript
30 lines
538 B
JavaScript
"use strict";
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let cache1 = new WeakMap();
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let cache2 = new WeakMap();
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function get(func, k) {
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let c1 = cache1.get(func);
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if (!c1) cache1.set(func, (c1 = new Map()));
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if (c1.has(k)) return c1.get(k);
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const c2 = cache2.get(func);
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const v = c2 && c2.has(k) ? c2.get(k) : func(k);
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c1.set(k, v);
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return v;
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}
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function getter(func) {
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return k => get(func, k);
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}
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function purge() {
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cache2 = cache1;
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cache1 = new WeakMap();
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}
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setInterval(purge, 120000);
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exports.get = get;
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exports.getter = getter;
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exports.purge = purge;
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