regexp.test() is faster than string.match().
regexp.test() is faster than string.match().

To filter by Content-Type in compress middleware, regexp.test() should be more appropriate, because
we only need a boolean test.

chinazhaghai/connect,llwanghong/connect,khirayama/connect,keenwon/connect,lian774739140/connect,RoseTHERESA/connect,qitianchan/connect,mi2oon/connect,austincitylimits/connect,tanveer12332/connect,gtomitsuka/connect,wghust/connect,behind2/connect,senchalabs/connect,RickyDan/connect,liuwei9413/connect,davehorton/drachtio,khalerc/connect,dkfiresky/connect,mi2oon/connect