Info

check overhead of using try catch on every operation VS on a single wrapping operation and with errors and without

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var testAmount = 100;
    
    function runTest1(index) {
      index = index || 0;
      var i;
      try {
        for (i = index; i < testAmount; ++i) {
          window.x = random();
          throw new Error('test error');
        }
      } catch (e) {
        var y = e.stack;
        runOnError1(i + 1);
      }
    }
    
    function runOnError1(index) {
      runTest1(index);
    }
    
    function runTest2() {
      for (var i = 0; i < testAmount; ++i) {
        try {
          window.x = random();
          throw new Error('test error');
        } catch (e) {
          var y = e.stack;
        }
      }
    }
  };
</script>

Test runner

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function runTest() {
  for (var i = 0; i < testAmount; ++i) {
    try {
      window.x = random();
    } catch (e) {
      var y = e.stack;
    }
  }
}
runTest()

function runTest() {
  try {
    for (var i = 0; i < testAmount; ++i) {
      window.x = random();
    }
  } catch (e) {
    var y = e.stack;
  }
}
runTest()

function runTest() {
  for (var i = 0; i < testAmount; ++i) {
    try {
      window.x = random();
      throw new Error('test error');
    } catch (e) {
      var y = e.stack;
    }
  }
}
runTest()

function runTest(index) {
  index = index || 0;
  var i;
  try {
    for (i = index; i < testAmount; ++i) {
      window.x = random();
      throw new Error('test error');
    }
  } catch (e) {
    var y = e.stack;
    runOnError(i + 1);
  }
}

function runOnError(index) {
  runTest(index);
}
runTest()

runTest1();

runTest2();

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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 Ido Rosenthal on 17th February 2013
• Revision 2: published on 19th February 2013
• Revision 3: published on 19th February 2013

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