perf(uses-http2): check protocol first (#2701)
perf(uses-http2): check protocol first (#2701)


arturmiz/lighthouse,umaar/lighthouse,umaar/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,mixed/lighthouse,wardpeet/lighthouse,mixed/lighthouse,wardpeet/lighthouse,tkadlec/lighthouse,arturmiz/lighthouse,GoogleChrome/lighthouse,arturmiz/lighthouse,GoogleChrome/lighthouse,mixed/lighthouse,ev1stensberg/lighthouse,GoogleChrome/lighthouse,tkadlec/lighthouse,arturmiz/lighthouse,deepanjanroy/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,GoogleChrome/lighthouse,deepanjanroy/lighthouse,ev1stensberg/lighthouse,deepanjanroy/lighthouse,umaar/lighthouse,wardpeet/lighthouse,mixed/lighthouse,ev1stensberg/lighthouse,tkadlec/lighthouse,deepanjanroy/lighthouse,umaar/lighthouse,deepanjanroy/lighthouse,tkadlec/lighthouse,ev1stensberg/lighthouse