JSON 3

JavaScript performance comparison

Revision 31 of this test case created by David Aurelio

Info

This test benchmarks JSON 3 against other JSON implementations.

The following implementations support parsing and serializing:

The following implementations only support parsing:

Preparation code

<!-- JSON 3 v3.2.2 -->
<script>
  // Disable the native JSON implementation.
this.nativeJSON = this.JSON;
  this.JSON = null;
</script>
<script src="http://bestiejs.github.com/json3/lib/json3.min.js"></script>
<!-- JSON 2 -->
<script>
  // Set up JSON 2.
  this.JSON3 = this.JSON;
  this.JSON = null;
</script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/json2/20110223/json2.js"></script>
<script>
  this.JSON2 = this.JSON;
  this.JSON = null;
</script>
<!-- `json-parse-state` (Crockford's state machine parser) -->
<script src="http://dl.dropbox.com/u/43343137/json_parse_state.js"></script>
<script>
  // `json-parse` is exposed via the `json_parse` function as well.
  this.json_parse_state = this.json_parse;
</script>
<!-- `json-parse` (Crockford's recursive descent parser) -->
<script src="http://dl.dropbox.com/u/43343137/json_parse.js"></script>
<!-- Mike Samuel's `json-sans-eval` -->
<script src="http://json-sans-eval.googlecode.com/svn/trunk/src/json_sans_eval.js"></script>
<!-- Asen Bozhilov's `evalJSON` -->
<script src="http://dl.dropbox.com/u/43343137/evalJSON.js"></script>
<script>
function json_with_function(json) {
  return Function('return '+json)();
}
</script>
<script>
Benchmark.prototype.setup = function() {
    var value = '{"kitcambridge":"Kit","contributors":{"jdalton":"John-David","mathias":"Mathias"},"list":[1,2,3],"number":5,"date":"2012-04-25T14:08:36.879Z","boolean":true,"nil":null}';
};
</script>

Preparation code output

Test runner

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Testing in unknown unknown
Test Ops/sec
JSON 3: parse
JSON3.parse(value);
pending…
JSON 2: parse
JSON2.parse(value);
pending…
json-parse-state
json_parse_state(value);
pending…
json-parse
json_parse(value);
pending…
json-sans-eval
jsonParse(value);
pending…
evalJSON
evalJSON(value);
pending…
native json.parse
nativeJSON.parse(value);
pending…
Naïve Function() approach
json_with_function(value)
pending…

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