I get the same thing. On my machine it's 80% slower. One solution is to use a string comparison. The high number is only 7% slower in that case. http://jsperf

I get the same thing. On my machine it's 80% slower. One solution is to use a string comparison. The high number is only 7% slower in that case. http://jsperf.com/qsmflkjtest/2 http://jsperf.com/qsmflkjtest/2