Benchmark: array item replacement performance comparisons

Script Preparation code:


var arr = Array.from({ length: 5000 }, (item, index) => index);

Tests:

Slice and splice
const changeIndex = 111; const newTestArray = arr.slice(); newTestArray.splice(changeIndex, 1, 8080);
Slice and concat
const changeIndex = 222; const newTestArray = arr.slice(0, changeIndex).concat(13, arr.slice(changeIndex + 1));
Slice and spread
const changeIndex = 333; const newTestArray = [ ...arr.slice(0, changeIndex), 42, ...arr.slice(changeIndex + 1)];
Spread and splice
const changeIndex = 444; const newTestArray = [...arr]; newTestArray.splice(changeIndex, 1, 1111);

Rendered benchmark preparation results:

Previous results

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Related benchmarks:

array item replacement performance comparisons (version: 0)