array vs object

Benchmark created by Abraham on

Setup

var arr = [],
    i,
    obj = {};
    for(i = 0; i < 100; i = i + 1) {
      var item = {index: i};
      arr.push(item);
      obj[i] = item;
    }

Test runner

Ready to run.

Testing in
TestOps/sec
array
for (var x=0; x<arr.length; x++) {
    i = arr[x].index;
}
ready
object
for (var x=0; x<100; x++) {
    i = obj[x].index;
}
ready
object unknown length
var keys = Object.keys(obj);
for (var x = 0; x < keys.length; x++){
  i = obj[keys[x]].index;
}
ready

Revisions

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