Backwards String Building (v18)

Revision 18 of this benchmark created on

Description

Tests the performance difference of using different ways of building strings backwards.

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var str = "";
for (var i = 0; i < 300; i++) {
  str = 'x' + str;
}
ready
push, reverse, join
var str;
var array = [];
for (var i = 0; i < 300; i++) {
  array.push('x');
}
array.reverse();
str = array.join('');
ready
unshift, join
var str;
var array = [];
for (var i = 0; i < 300; i++) {
  array.unshift('x');
}
str = array.join('');
ready
push, reverse, fromCharCode
var str;
var array = [];
for (var i = 0; i < 300; i++) {
  array.push(120);
}
array.reverse();
str = String.fromCharCode(array);
ready

Revisions

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