Compares a classic indexed for loop against Array.prototype.forEach for summing an array.
var iterations = 20000;0x0D
var arr=Array.from({length:1000},function(_,i){return i});var t=0;for(var i=0;i<arr.length;i++){t+=arr[i]}var t=0;arr.forEach(function(n){t+=n});var t=0;for(var i=0;i<arr.length;i++){t+=arr[i]}var t=0;arr.forEach(function(n){t+=n});var t=0;for(var i=0;i<arr.length;i++){t+=arr[i]}var t=0;arr.forEach(function(n){t+=n});| Browser | Snippet A | Snippet B | Winner |
|---|---|---|---|
1st | 13.70 ms | 39.30 ms | Snippet A2.87× faster |
Median of 5 trials × 20,000 iterations per snippet.