Run results for: 闭包变量创建方式 iife vs function call

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36 Edg/143.0.0.0

Browser: Chrome 143

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 6 months ago

iife

179.1M/s

array function

115.5M/s

block

114.0M/s

View exact numbers

Test name	Executions per second
✓ iife	179,144,272 Ops/sec
array function	115,492,728 Ops/sec
block	113,996,568 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

iife
const result = (() => { const x = i; return () => x * 2; })();
block
{ const x = i; const fn = () => x * 2; fn(); }
array function
const x = i; const fn = () => x * 2; fn();