Run results for: Splice vs new Array Fix

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:104.0) Gecko/20100101 Firefox/104.0

Browser: Firefox 104

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Splice	265120.0 Ops/sec
Copy to new	43305.0 Ops/sec

Script Preparation code:

var randomArray=Array.from({length: 1000}, () => Math.floor(Math.random() * 100));

​x
 
var randomArray=Array.from({length: 1000}, () => Math.floor(Math.random() * 100));​

Tests:

Splice

for (let i = randomArray.length - 1; i >= 0; --i) {
  if (randomArray[i] !=  1) {
    continue;
  }
  randomArray.splice(i, 1);
}
return randomArray;

 
for (let i = randomArray.length - 1; i >= 0; --i) {  if (randomArray[i] !=  1) {    continue;  }  randomArray.splice(i, 1);}return randomArray;

Copy to new

var newArray = [];
for (let i = randomArray.length - 1; i >= 0; --i) {
  if (randomArray[i] ==  1) {
    continue;
  }
  newArray.push(randomArray[i]);
}
return newArray;

 
var newArray = [];for (let i = randomArray.length - 1; i >= 0; --i) {  if (randomArray[i] ==  1) {    continue;  }  newArray.push(randomArray[i]);}return newArray;