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 + bChakra:
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 loop851,761 op/s    » for...of12,507,823 op/s » for loop, i < arr.lengthChakra:
for...of vs for loop1,133,193 op/s  » for...of16,715,320 op/s » for loop, i < arr.length

merge-objects.js

V8:
merge objects669,921 op/s    » Object.assign23,625,182 op/s » for...in loop and assignChakra:
merge objects3,102,889 op/s  » Object.assign3,744,837 op/s  » for...in loop and assign

declear-class.js

V8:
declear a class118,864 op/s » Class153,662 op/s » use function and prototypeChakra:
declear a class560,705 op/s » Class701,991 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 array1,302,649 op/s » Array.from540,458 op/s   » Array.prototype.slice.callChakra:
array like object to array1,864,649 op/s » Array.from2,537,458 op/s   » Array.prototype.slice.call

promise-bluebird.js

promise vs bluebird
V8:322,534 op/s   » promise1,763,186 op/s » bluebirdChakra:69,534 op/s   » promise178,186 op/s » bluebird

var-let-const.js

V8:
var let const134,028,614 op/s » let129,193,000 op/s » const431,460,321 op/s » varChakra:
var let const156,028,614 op/s » let170,193,000 op/s » const150,460,321 op/s » var

string-start-with.js

V8:
string starts with9,774,987 op/s  » string.startsWith(value)74,127,611 op/s » string[0] === valueChakra:
string starts with26,774,987 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 this59,661,143 op/s » () =>64,874,220 op/s » function statementChakra:
define a function with inherited this69,661,143 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()