- var count = 100000000
- , sum = 0
- while (count--) (function() { sum++ })()
- $ time node anonymous.js
- real 0m1.456s
- user 0m0.015s
- sys 0m0.031s
- var count = 100000000
- , sum = 0
- var cb = function() {
- sum++
- }
- while (count--) cb()
- $ time node named.js
- real 0m0.575s
- user 0m0.000s
- sys 0m0.046s
函数声明
- var func = function() {
- console.log('a')
- }
- function func() {
- console.log('b')
- }
- var func = function() {
- console.log('a')
- }
- function func() {
- console.log('b')
- }
- //输出为: a
- var count = 100000000
- , sum = 0
- function cb() {
- sum++
- }
- while (count--) cb()
- $ time node named.js
- real 0m0.553s
- user 0m0.000s
- sys 0m0.015s
- $ time node named2.js
- real 0m0.529s
- user 0m0.000s
- sys 0m0.047s
来源: