Flatten an array - loop vs reduce (v2)

Revision 2 of this benchmark created on

Setup

input = [[0, 1], [2, 3], [4, 5]];
    flatBind = [].concat.apply.bind([].concat, []);

Test runner

Ready to run.

Testing in
TestOps/sec
loop
var flattened=[];
for (var i=0; i<input.length; ++i) {
    var current = input[i];
    if (Array.isArray(current))
      for (var j=0; j<current.length; ++j)
        flattened.push(current[j]);
    else
      flattened.push(current);
}
ready
reduce
var flattened = input.reduce(function(a, b) {
    return a.concat(b);
}, []);
ready
concat.apply
var flattened = Array.prototype.concat.apply([],input);
ready
forEach+push
var flattened=[];
input.forEach(function(entry) {
    flattened.push[Array.isArray(entry) ? 'apply' : 'call'](flattened,entry);
});
ready
Bound concat
flatBind(input);
ready

Revisions

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