delete is slow (v2)

Revision 2 of this benchmark created by Wills Bithrey on

Setup

var arr = [1,2,3,4,5,6];
    var arrDeleted = [1,2,3,4,5,6];
    var arrayDeletedSplice = [1,2,3,4,5,6];
    var arrayDeletedPop = [1,2,3,4,5,6];
    var arrayDeletedLength = [1,2,3,4,5,6];
    
    delete arrDeleted[3];
    
    delete arrayDeletedLength[arrayDeletedLength.length - 1];
    arrayDeletedLength.length = 5;
    
    arrayDeletedSplice.splice(3, 1);
    arrayDeletedPop.pop();

Test runner

Ready to run.

Testing in
TestOps/sec
delete
for(var i = 0; i < arrDeleted.length; i++){
  console.log(arrDeleted[i]);
}
ready
no delete
for(var i = 0; i < arr.length; i++){
  console.log(arr[i]);
}
ready
delete with splice
for(var i = 0; i < arrayDeletedSplice.length; i++){
  console.log(arrayDeletedSplice[i]);
}
ready
delete with pop
for(var i = 0; i < arrayDeletedPop.length; i++){
  console.log(arrayDeletedPop[i]);
}
ready
delete from end with manual length correction
for(var i = 0; i < arrayDeletedLength.length; i++){
  console.log(arrayDeletedLength[i]);
}
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.