Object.keys vs hasOwnProperty (v33)

Revision 33 of this benchmark created by aedm on

Setup

var i;
    var key;
    var keys;
    var l;
    var value;
    var hasOwnProperty = {}.hasOwnProperty;
    var obj = { 'a':1, 'b':2, 'c':3, 'd':4, 'e':5, 'f':6, 'g':7, 'h':8, 'i':9, 'j':10 };

Test runner

Ready to run.

Testing in
TestOps/sec
hasOwnProperty
for ( key in obj ) {
    if ( hasOwnProperty.call( obj,  key ) ) {
        value = obj[key];
    }
}
ready
Object.keys
keys = Object.keys( obj );
for( i = 0, l = keys.length; i < l; i++ ) {
    value = obj[ keys[ i ] ];
}
ready
Object.keys with forEach
keys = Object.keys( obj ).forEach(function( key ) {
  value = obj[ key ];
});
ready
in + Object.keys
keys = Object.keys(obj);
for ( var i in keys ) {
    value = obj[keys[i]];
}
ready

Revisions

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