nano-memoize/dist/nano-memoize.min.js

Faster than fast, smaller than micro ... a nano speed and nano size memoizer.

(function(){"use strict";var assign=Object.assign;if(typeof assign!=="function"){assign=function(){var a=arguments,o=arguments[0];if(o===null||o===undefined){throw new TypeError("Cannot convert undefined or null to object")}o=Object(o);for(var i=1;i<a.length;i++){if(a[i]&&typeof a[i]==="object"){for(var k in a[i]){o[k]=a[i][k]}}}return o}}function vrgs(f){var s=f+"",i=s.indexOf("...");return i>=0&&(i<s.indexOf(")")||s.indexOf("arguments")>=0)}function nanomemoize(fn,o){o||(o={});var vargs=o.vargs||vrgs(fn),s=Object.create(null),k=[],v=[],wm=new WeakMap,d=function(key,c,k){return setTimeout(function(){if(k){c.splice(key,1);k.splice(key,1);return}c instanceof WeakMap?c.delete(key):delete c[key]},o.maxAge)},c=o.maxAge>0&&o.maxAge<Infinity?d:0,eq=o.equals?o.equals:function(a,b){return a===b},maxargs=o.maxArgs,srlz=o.serializer,f,u;if(fn.length===1&&!o.equals&&!vargs){f=function(a){var t=typeof a;if(!srlz&&(t==="object"&&a||t==="function")){var r;return wm.get(a)||(!c||c(a,wm),wm.set(a,r=fn.call(this,a)),r)}var key=t==="number"||t==="boolean"||a==null?a:t==="string"?JSON.stringify(a):srlz(a);return s[key]||(!c||c(key,s),s[key]=fn.call(this,a))}.bind(this);u=1}else{f=function(){var l=maxargs||arguments.length,i;for(i=k.length-1;i>=0;i--){if(!maxargs&&k[i].length!==l)continue;for(var j=l-1;j>=0&&eq(k[i][j],arguments[j]);j--){if(j===0){return v[i]}}}i=k.length-(i+1);return!c||c(i,v,k),v[i]=fn.apply(this,k[i]=arguments)}.bind(this)}f.clear=function(){wm=new WeakMap;s=Object.create(null);k=[];v=[]};f.keys=function(){return u?null:k.slice()};f.values=function(){return u?null:v.slice()};f.keyValues=function(){return u?{primitives:assign({},s),objects:wm}:null};return f}if(typeof module!=="undefined"){module.exports=nanomemoize}if(typeof window!=="undefined"){window.nanomemoize=nanomemoize}}).call(this);