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一些当前 Node.js 中最流行 ES6 特性的 benchmark （V8 / Chakra）

前言

项目 github 地址： https://github.com/DavidCai1993/ES6-benchmark

如果有想要增加的特性 benchmark ，欢迎更新 benchmarks/ ，然后 PR 。

环境

CPU: Intel Core(TM) i5-2410M 2.30GHz
Memory: 8GB 1600 MHz DDR3
Node.js: 5.9.0 / Node-chakracore 6.0.0-pre5

大致结论

许多情况下： V8 ES5 >> Chakra ES6 > Chakra ES5 > V8 ES6

Chakra 下的 ES6 特性表现相对更好。

Benchmark

concat-strings.js

V8: template string vs use +   14,643,602 op/s » ${a}${b}   96,959,110 op/s » a + b  Chakra: template string vs use +   35,756,501 op/s » ${a}${b}   19,995,366 op/s » a + b

for-of-for-loop.js

V8: for...of vs for loop   851,761 op/s    » for...of   12,507,823 op/s » for loop, i < arr.length  Chakra: for...of vs for loop   1,133,193 op/s  » for...of   16,715,320 op/s » for loop, i < arr.length

merge-objects.js

V8: merge objects   669,921 op/s    » Object.assign   23,625,182 op/s » for...in loop and assign  Chakra: merge objects   3,102,889 op/s  » Object.assign   3,744,837 op/s  » for...in loop and assign

declear-class.js

V8: declear a class   118,864 op/s » Class   153,662 op/s » use function and prototype  Chakra: declear a class   560,705 op/s » Class   701,991 op/s » use function and prototype

repeat-string.js

V8: string.repeat() vs use +   8,828,842 op/s   » string.repeat()   107,824,137 op/s » use +  Chakra: string.repeat() vs use +   13,022,259 op/s  » string.repeat()   3,328,631 op/s   » use +

array-like-to-array.js

V8: array like object to array   1,302,649 op/s » Array.from   540,458 op/s   » Array.prototype.slice.call  Chakra: array like object to array   1,864,649 op/s » Array.from   2,537,458 op/s   » Array.prototype.slice.call

promise-bluebird.js

promise vs bluebird V8:   322,534 op/s   » promise   1,763,186 op/s » bluebird  Chakra:   69,534 op/s   » promise   178,186 op/s » bluebird

var-let-const.js

V8: var let const   134,028,614 op/s » let   129,193,000 op/s » const   431,460,321 op/s » var  Chakra: var let const   156,028,614 op/s » let   170,193,000 op/s » const   150,460,321 op/s » var

string-start-with.js

V8: string starts with   9,774,987 op/s  » string.startsWith(value)   74,127,611 op/s » string[0] === value  Chakra: string starts with   26,774,987 op/s » string.startsWith(value)   47,127,611 op/s » string[0] === value

define-a-funciton-with-this.js

V8: define a function with inherited this   59,661,143 op/s » () =>   64,874,220 op/s » function statement  Chakra: define a function with inherited this   69,661,143 op/s » () =>   69,874,220 op/s » function statement

parse-int.js

V8: global.parseInt() vs Number.parseInt()   53,940,634 op/s  » Number.parseInt()   81,509,873 op/s  » global.parseInt()  Chakra: global.parseInt() vs Number.parseInt()   16,940,634 op/s  » Number.parseInt()   19,509,873 op/s  » global.parseInt()

原文 https://segmentfault.com/a/1190000004648900

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