Run results for: array vs frozen array loop

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
normal array	22742072.0 Ops/sec
frozen array	19332124.0 Ops/sec

Script Preparation code:

var a = [
    /@atlassian\/parcel/,
    /@parcel\//,
    /@oxc-resolver\/.+/,
];
var b = Object.freeze([
    /@atlassian\/parcel/,
    /@parcel\//,
    /@oxc-resolver\/.+/,
]);

Tests:

normal array
for (const matcher of a) { if (matcher.test("SOMETHING")) { return 'yes'; } return 'no' }
frozen array
for (const matcher of b) { if (matcher.test("SOMETHING")) { return 'yes'; } return 'no' }

Run results for: array vs frozen array loop

normal array

frozen array