Make matchPattern* faster
Make matchPattern* faster

91.34user 122.72system 3:52.62elapsed 92%CPU (1180900maxresident)k =>
72.13user 116.77system 3:23.43elapsed 92%CPU (1142280maxresident)k
for repo/android.sh time kati --kati_cpuprofile=kati.prof -n

google/kati,colincross/kati,dalinaum/kati,danw/kati,shinh/kati,danw/kati,shinh/kati,pombredanne/kati,google/kati,google/kati,google/kati,colincross/kati,colincross/kati,shinh/kati,danw/kati,danw/kati,danw/kati,pombredanne/kati,dalinaum/kati,shinh/kati,colincross/kati,pombredanne/kati,google/kati,danw/kati,shinh/kati,pombredanne/kati,dalinaum/kati,dalinaum/kati,pombredanne/kati,dalinaum/kati,colincross/kati,shinh/kati,colincross/kati,pombredanne/kati