Simple memoization.

npm install mhingston/memo

const memo = require('memo');

function myFunc(a, b)
{
    return a + b;
}

const memoizedFunc = memo(myFunc);
memoizedFunc(1, 2); // 3 (uncached)
memoizedFunc(1, 2); // 3 (cached)

• fn {Function} Function to memoize.
• options {Object} Configuration object with the following properties:
  • cacheSize {Number} How many function calls to cache. Default = 100.
  • cacheDuration {Number} How long until a cached value expires (milliseconds). Default = 300000 (5 minutes).

When wrapping a function which uses this remember to bind this on your memoized function.

function myFunc(a, b)
{
    return this.getTime() + a + b;
}

const memoizedFunc = memo(myFunc).bind(new Date());
memoizedFunc(1, 2); // (uncached)
memoizedFunc(1, 2); // (cached)