comparing underscore.js 'isFunction' with 'typeof function' (v12)

Revision 12 of this benchmark created on

Preparation HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="http://underscorejs.org/underscore.js"></script>

Test runner

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Testing in
TestOps/sec
underscore isFunction
var obj = function() {
  console.log("test")
};
return toString.call(obj) == '[object Function]';
ready
typeof 'function'
var obj = function() {
  console.log("test")
};
return 'function' === typeof obj;
ready
Actual _.isFunction
var obj = function() {
  console.log("test")
};
return _.isFunction(obj);
ready
instanceof
var obj = function() {
  console.log("test")
};
obj instanceof Function
ready

Revisions

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