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Run results for:
Slice vs Splice insert element to array
Compares the speed for add/remove 1 items of an array
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36
Browser:
Chrome 133
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
insert by join multi sub-array
4034.4 Ops/sec
insert by using splice
64541.8 Ops/sec
Script Preparation code:
var array = [] for (let i = 0; i < 100000; i++) {array.push(i)} var indexToRemove = 6700 var indexToInsert = 4200
Tests:
insert by join multi sub-array
array = array.slice(0,indexToInsert).concat('meo', array.slice(indexToInsert, indexToRemove), array.slice(indexToRemove+1, array.length))
insert by using splice
array.splice(indexToRemove, 1) array.splice(indexToInsert, 0, 'meo')