Benchmark: reverse string2 - MeasureThat.net

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(""); }

Rendered benchmark preparation results:

Previous results

Test case name	Result
split reverse join
traditional for loop
for of
traditional for loop and join
spread reverse join

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.0.0 Safari/537.36

Browser/OS: Chrome 101 on Windows

Test name	Executions per second
split reverse join	63.6 Ops/sec
traditional for loop	223.6 Ops/sec
for of	163.2 Ops/sec
traditional for loop and join	51.8 Ops/sec
spread reverse join	52.3 Ops/sec

reverse string2 (version: 1)