errorstacks

JavaScript performance comparison

Revision 3 of this test case created by derry

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    function get_callsite(belowFn, up) {
      var oldLimit = Error.stackTraceLimit;
      Error.stackTraceLimit = up===undefined ? Infinity : up;
   
      var dummyObject = {};
   
      var v8Handler = Error.prepareStackTrace;
      Error.prepareStackTrace = function(dummyObject, v8StackTrace) {
        return v8StackTrace;
      };
      Error.captureStackTrace(dummyObject, belowFn || get_callsite);
   
      var v8StackTrace = dummyObject.stack;
      Error.prepareStackTrace = v8Handler;
      Error.stackTraceLimit = oldLimit;
   
      return v8StackTrace;
    }
   
};
</script>

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Testing in unknown unknown
Test Ops/sec
no stack
var error = new Error;
Error.captureStackTrace(error);
var stack = error;
pending…
stack
var error = new Error;
Error.captureStackTrace(error);
var stack = error.stack;
pending…
no stack no capture
var error = new Error;
var stack = error;
pending…
stack no capture
var error = new Error;
var stack = error.stack;
pending…
captureStackTrace 2
get_callsite(undefined, 2);
pending…

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