Info

I've always used

foo += bar;

for string concatenation but I'm curious how it performs against

foo = foo + bar;

at high volume.

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var a = 'hello';
    var b = ' world, ';
  };
</script>

Test runner

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a += b

a = a + b

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by scunliffe on 9th December 2010
• Revision 3: published by Russell Dempsey on 1st March 2013

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