Run results for: TextEncoder vs String hash v2

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 15_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6,2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.7

Device Platform: Tablet

Date tested: 2 years ago

Test name	Executions per second
Baseline encoder	2189.9 Ops/sec
baseline hash	2283.6 Ops/sec

Script Preparation code:

iterations = 1000;
function randomStringGen(n) {
    let strings = [];
    for (let i = 0; i < n; i++) {
      let s = Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);
      strings[i] = s;
    }
    return strings;
}
var randomStrings = randomStringGen(iterations);
var encoder = new TextEncoder();
var arrayBuffer = new ArrayBuffer(iterations*1000);
var buffer = new Uint8Array(arrayBuffer);

Tests:

Baseline encoder
var j = 0; for (let i = 0; i < iterations; i++) { var str = randomStrings[i % iterations]; buffer[j] = str.length; var res = encoder.encodeInto(str, buffer.subarray(j+1)); j = j + res.written; }
baseline hash
var stringMap = {}; var counter = 0; function stringToMap(s) { var i = stringMap[s]; if (i === undefined) { stringMap[s] = counter++; } else { return i; } } var j = 0; for (let i = 0; i < iterations; i++) { var str = randomStrings[i % iterations]; var num = stringToMap(str); buffer[j] = num; j = j + 8; }

Run results for: TextEncoder vs String hash v2

Test TextEncoder encoding vs simply encoding with a string

Baseline encoder

baseline hash