Run results for: .includes() vs indexOf() for single-character search in string

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0

Browser: Firefox 124

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

indexOf()

1358.0M/s

includes()

1286.4M/s

View exact numbers

Test name	Executions per second
✓ indexOf()	1,358,021,632 Ops/sec
includes()	1,286,355,584 Ops/sec

Script Preparation code:

var my_str = "thisStrinWillEventuallyContainASpace see I told you?"

Tests: