swOperation/node_modules/@antv/g2/esm/utils/lru.js

import flru from 'flru';
const cache = flru(3);
/**
 * A decorator to return new function with LRU cache.
 */
export function lru(fn, keyFn = (...args) => `${args[0]}`, maxSize = 16) {
    const cache = flru(maxSize);
    return (...args) => {
        const key = keyFn(...args);
        let v = cache.get(key);
        if (cache.has(key))
            return cache.get(key);
        v = fn(...args);
        cache.set(key, v);
        return v;
    };
}
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