Run results for: sample normal vs Object.freeze vs Object.seal performance

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Chrome OS 14541.0.0

Device Platform: Desktop

Date tested: one year ago

normal

63.4M/s

seal

10.0M/s

freeze

9.6M/s

View exact numbers

Test name	Executions per second
✓ normal	63,445,984 Ops/sec
seal	9,965,352 Ops/sec
freeze	9,618,287 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

normal
var normal = { A: "aa", B: "bb", C: "cc", D: "dd", E: "ee", F: "ff", G: "gg", H: "hh", I: "ii", J: "jj", K: "kk", L: "ll" };
freeze
var freeze = Object.freeze({ A: "aa", B: "bb", C: "cc", D: "dd", E: "ee", F: "ff", G: "gg", H: "hh", I: "ii", J: "jj", K: "kk", L: "ll" });
seal
var seal = Object.seal({ A: "aa", B: "bb", C: "cc", D: "dd", E: "ee", F: "ff", G: "gg", H: "hh", I: "ii", J: "jj", K: "kk", L: "ll" });