Run results for: reverse string2

Run details:

User agent: Mozilla/5.0 (Linux; Android 7.0; LG-M400) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Mobile Safari/537.36

Browser: Chrome Mobile 87

Operating system: Android 7.0

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
split reverse join	6.4 Ops/sec
traditional for loop	12.7 Ops/sec
for of	11.1 Ops/sec
traditional for loop and join	4.8 Ops/sec
spread reverse join	5.6 Ops/sec

Script Preparation code:

var testcases = Array(1000).fill(0).map(() => Array(1000).fill(0).map(() => Math.floor(Math.random() * 10).toString()).join(""));

Tests:

split reverse join
for (let n = 0; n < 1000; n++) { const testcase = testcases[n]; const result = testcase.split("").reverse().join(""); }
traditional for loop
for (let n = 0; n < 1000; n++) { const testcase = testcases[n]; let result = ""; for (let i = testcase.length - 1; i >= 0; i--) { result += testcase[i]; } }
for of
for (let n = 0; n < 1000; n++) { const testcase = testcases[n]; let result = ""; for (const c of testcase) { result = c + result; } }
traditional for loop and join
for (let n = 0; n < 1000; n++) { const testcase = testcases[n]; let resultArr = []; for (let i = testcase.length - 1; i >= 0; i--) { resultArr.push(testcase[i]); } const result = resultArr.join(""); }
spread reverse join
for (let n = 0; n < 1000; n++) { const testcase = testcases[n]; const result = [...testcase].reverse().join(""); }