"Type of undefined" vs "=== undefined" (v63)

Revision 63 of this benchmark created on

Setup

var a = 1,
      b = true,
      c = "c",
      d = [],
      e = {}, u;

Test runner

Ready to run.

Testing in
TestOps/sec
typeof undefined
typeof a === 'undefined';
typeof b === 'undefined';
typeof c === 'undefined';
typeof d === 'undefined';
typeof e === 'undefined';
ready
undefined typeof
'undefined' === typeof a;
'undefined' === typeof b;
'undefined' === typeof c;
'undefined' === typeof d;
'undefined' === typeof e;
ready
=== undefined
a === undefined;
b === undefined;
c === undefined;
d === undefined;
e === undefined;
ready
undefined ===
undefined === a;
undefined === b;
undefined === c;
undefined === d;
undefined === e;
ready
=== undefined(local)
a === u;
b === u;
c === u;
d === u;
e === u;
ready
void 0
a === void 0;
b === void 0;
c === void 0;
d === void 0;
e === void 0;
ready
undefined typeof
'undefined' === typeof(a);
'undefined' === typeof(b);
'undefined' === typeof(c);
'undefined' === typeof(d);
'undefined' === typeof(e);
ready

Revisions

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