Memoize Function

Caches results of expensive function calls to improve performance when the same input is provided repeatedly. Example: memoize(Math.sqrt).

JavaScript7/17/2025

#performance#utilities

JavaScript

function memoize(fn) {
  const cache = new Map();
  return (arg) => {
    if (cache.has(arg)) return cache.get(arg);
    const result = fn(arg);
    cache.set(arg, result);
    return result;
  };
}

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