Run results for: indexOf vs startsWith for markers

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36

Browser: Chrome 96

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
indexOf	7007105.5 Ops/sec
indexOf (specifically at the start of the string)	7047941.5 Ops/sec
startsWith	6262066.5 Ops/sec

Script Preparation code:

var text = '<!-- jsx --><div><div>foobar</div><div>foobar</div><div>foobar</div></div>'
var marker = '<!-- jsx -->'

Tests: