Run results for: Array split vs string substring

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; Mi 10 Pro Build/RKQ1.200826.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.99 XWEB/3185 MMWEBSDK/20211001 Mobile Safari/537.36 MMWEBID/607 MicroMessenger/8.0.16.2040(0x2800105F) Process/toolsmp WeChat/arm64 Weixin NetType/4G Language/zh_CN ABI/arm64

Browser: Chrome 86

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Array.split	1413015.0 Ops/sec
Substring	2858474.0 Ops/sec

Script Preparation code:

var s1 = "foo.bar";
var s2 = "foo";

Tests:

Array.split
var n1 = s1.split(".")[0]; var n2 = s2.split(".")[0];
Substring
var n1 = s1.substring(0, s1.indexOf(".")); var n2 = s2.substring(0, s2.indexOf("."));

Run results for: Array split vs string substring

Array.split

Substring