Array performance

JavaScript performance comparison

Revision 3 of this test case created

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Testing in unknown unknown
Test Ops/sec
create array
 
var i;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
}
 pending…
create and fill array forwards
 
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
}
 pending…
create and fill array backwards
 
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=i-1; o>=0; o--) {
    arr[o]=o;
  }
}
 pending…
create, fill and pop
 
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  while (arr.length > 0)
    var x = arr.pop();
}
 pending…
create, fill and push
 
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  var arr2 = [];
  for (o=0; o<i; o++)
    var x = arr2.push(arr[o]);
}
 pending…
create, fill and reverse
 
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  arr.reverse();
  arr.reverse();
  arr.reverse();
  arr.reverse();
  arr.reverse();
}
 pending…
create, fill and shift
 
var i,o;
for (i=0; i<1024; i++) {
  var arr = new Array(i);
  for (o=0; o<i; o++) {
    arr[o]=o;
  }
  while (arr.length > 0)
    var x = arr.shift();
}
 pending…

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