var itm = '100,000,000 this is not a number'

var startTime = new Date()
for (var i = 0; i < 100000; i++)
{
	// method 1
//	if (itm.match(/^[+-]?[\d,]+(\.[\d,]*)?([eE][+-]?[\d,]+)?\%?$/) || itm.match(/^[+-]?\.[\d,]+([eE][+-]?[\d,]+)?\%?$/) || itm.match(/^0x[\da-f]+$/i))
//		var three = 2 + 1
	// method 2
	if (itm.match(/^[+-]?[\d,]+(?:\.[\d,]*)?(?:[eE][+-]?[\d,]+)?\%?$/)
		|| itm.match(/^[+-]?\.[\d,]+(?:[eE][+-]?[\d,]+)?\%?$/)
		|| itm.match(/^0x[\da-f]+$/i))
		var three = 2 + 1
	//method 3
//	if (itm.match(/^[+-]?(?:\d{1,3}(?:\,\d{3})*)*\.?\d*(?:[eE][+-]?\d+(?:\,\d{3})*)?[%\u00b0\u00bc\u00bd\u00be]?$/) && !itm.match(/^[eE]/))
//		var three = 2 + 1
}
var endTime = new Date()

//replace "WScript.echo" with "alert" or whatever you need to display the results
WScript.echo(endTime - startTime)