Created
November 28, 2022 21:37
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`window` namespace is so large
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| const max = 1e9 | |
| const measure = (f, pref) => { | |
| console.log(pref) | |
| console.time('m') | |
| f() | |
| console.timeEnd('m') | |
| } | |
| console.log('var plain') | |
| console.time('m') | |
| for (var i = 0; i < max; i += 1){} | |
| console.timeEnd('m') | |
| measure(() => { | |
| for (var i = 0; i < max; i += 1){} | |
| }, 'var fn') | |
| console.log('let plain') | |
| console.time('m') | |
| for (let i = 0; i < max; i += 1){} | |
| console.timeEnd('m') | |
| measure(() => { | |
| for (let i = 0; i < max; i += 1){} | |
| }, 'let fn') | |
| // | |
| // browser | |
| // | |
| // var plain | |
| // m: 1703.656005859375 ms | |
| // var fn | |
| // m: 505.61376953125 ms | |
| // let plain | |
| // m: 525.339111328125 ms | |
| // let fn | |
| // m: 505.01611328125 ms | |
| // | |
| // node | |
| // | |
| // var plain | |
| // m: 498.885ms | |
| // var fn | |
| // m: 498.518ms | |
| // let plain | |
| // m: 495.647ms | |
| // let fn | |
| // m: 495.929ms |
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