Run results for: large string comparison1

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

1MB string comparison

452K/s

2MB string comparison

53K/s

10MB string comparison

2K/s

1MB string comparison+

246/s

2MB string comparison+

114/s

10MB string comparison+

23/s

View exact numbers

Test name	Executions per second
✓ 1MB string comparison	452,041 Ops/sec
2MB string comparison	52,614 Ops/sec
10MB string comparison	2,013 Ops/sec
1MB string comparison+	246 Ops/sec
2MB string comparison+	114 Ops/sec
10MB string comparison+	23 Ops/sec

Script Preparation code:

let s1MB = "0123456789".repeat(1000*100);
var strings1MB = Array.from(Array(20)).map(o=>s1MB + String.fromCharCode(32+~~(Math.random()*96)))

let s2MB = "0123456789".repeat(1000*200);
var strings2MB = Array.from(Array(20)).map(o=>s2MB + String.fromCharCode(32+~~(Math.random()*96)))

let s10MB = "0123456789".repeat(1000*1000);
var strings10MB = Array.from(Array(20)).map(o=>s10MB + String.fromCharCode(32+~~(Math.random()*96)))
function compare(a, b) {
    const lenA = a.length;
    const lenB = b.length;
    const minLen = lenA < lenB ? lenA : lenB;
    var i = 0;
    for (; i < minLen; ++i) {
        const ca = a.charCodeAt(i);
        const cb = b.charCodeAt(i);
        if (ca > cb)
            return 1;
        else if (ca < cb)
            return -1;
    }
    if (lenA === lenB)
        return 0;
    return lenA > lenB ? 1 : -1;
};

Tests:

1MB string comparison
const s1 = strings1MB[~~(strings1MB.length*Math.random())]; const s2 = strings1MB[~~(strings1MB.length*Math.random())]; const b = s1 === s2;
2MB string comparison
const s1 = strings2MB[~~(strings2MB.length*Math.random())]; const s2 = strings2MB[~~(strings2MB.length*Math.random())]; const b = s1 === s2;
10MB string comparison
const s1 = strings10MB[~~(strings10MB.length*Math.random())]; const s2 = strings10MB[~~(strings10MB.length*Math.random())]; const b = s1 === s2;
1MB string comparison+
const s1 = strings1MB[~~(strings1MB.length*Math.random())]; const s2 = strings1MB[~~(strings1MB.length*Math.random())]; const b = compare(s1,s2);
2MB string comparison+
const s1 = strings2MB[~~(strings2MB.length*Math.random())]; const s2 = strings2MB[~~(strings2MB.length*Math.random())]; const b = compare(s1,s2);
10MB string comparison+
const s1 = strings10MB[~~(strings10MB.length*Math.random())]; const s2 = strings10MB[~~(strings10MB.length*Math.random())]; const b = compare(s1,s2);