Run results for: indexOf: compare to -1 or use ~

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.114 YaBrowser/20.11.1.81 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 20

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Compare to -1	1430872.2 Ops/sec
Use tilde	1420958.5 Ops/sec

Script Preparation code:

var constants = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
var findable = 'A';
var unfindable = '0';

Tests:

Compare to -1
if (constants.indexOf(findable) !== -1) { var A = true; } if (constants.indexOf(unfindable) !== -1) { var O = true; }
Use tilde
if (~constants.indexOf(findable)) { var A = true; } if (~constants.indexOf(unfindable)) { var O = true; }

Run results for: indexOf: compare to -1 or use ~

Compare to -1

Use tilde