????????? 1. ???? ???????? tcp?????????????????????????TCP???????????????RTT??????????????? 2. ??? HTTP/1.1???? Keep-Alive ?????? pipeline????????? TCP ??????????????????pipeline??????GET?HEAD??? 3. ?? 3.1 Cache-control ??????????????????? max-age ???????????????????????????????????????????????? max-age = 0???????????????????????????????????????????? 3.2 If-Modified-Since ??????????????????????????????????????????????????????????? 304 Not Modified ????????????? HTTP/2.0 ???? 1. ???? ???????????? key value ??????????????????????????? 2. ??????? ???TCP???????????????????ID?????????????????????????????????????????? ?????????????????????Header??Data???????????????? ???????????????????????????????????????????????????????????????????????????????????????????????? 3. ????? ?????????????????????? QUIC?google?????1. ??????? HTTP/2.0???TCP?????TCP??????????????IP????????IP???????????????????????????????????????????????????????????????HTTP/2.0???????TCP??????????? QUIC??????????????????64???????ID?????UDP???????????IP???????????????ID???????????? 2. ???????? ? HTTP/2.0?????? QUIC ????????? stream?????? HTTP????? QUIC ??? UDP???????????? stream ???????????? stream2 ????? UDP??????? stream3 ??? UDP ???? stream2 ??????????? stream3 ?????????????????
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