for-in-vs-object-keys-predicate

Benchmark created on December 17, 2013

Setup

a=Object.create(null);
    b=Object.create(null);
    b.a=1;
    b.b=2;
    b.c=3;
    b.d=4;
    
    function forIn(y) {
      for (x in y) {
        return true;
      }
      return false;
    }
    
    function objectKeys(y) {
      return !!Object.keys(y).length;
    }

Test runner

forIn(a);
forIn(b);

objectKeys(a);
objectKeys(b);

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published on December 17, 2013