Python pattern searching using re standard lib, str.find()

I'm trying to improve some code in order to get a better perfomance, I have to do a lot of pattern matching for little tags on medium large strings, for example:

import re
STR = "0001x10x11716506872xdc23654&xd01371600031832xx10xID=000110011001010\n"

def getID(string):
    result = re.search('.*ID=(\d+)', string)
    if result:
        print result.group(1)
    else:
        print "No Results"

Taking in mind the perfomance I rewrite it:

def getID2(string):
    result = string.find('ID=')
    if result:
        result += 3
        print string[result:result+15]
    else:
        print 'No Results'

Are there a better way to improve these approaches? Any comments are welcome...