every usage of static grpc metadata. Inlined hpack table lookups for static metadata. This leads to faster hpack parser creation: BM_HpackParserInitDestroy 5.32µs ± 1% 0.06µs ± 1% -98.91% (p=0.000 n=18+19) And slightly faster parsing: BM_HpackParserParseHeader<RepresentativeClientInitialMetadata, OnInitialHeader> 456ns ± 1% 435ns ± 1% -4.74% (p=0.000 n=18+19) BM_HpackParserParseHeader<MoreRepresentativeClientInitialMetadata, OnInitialHeader> 1.06µs ± 2% 1.04µs ± 2% -1.82% (p=0.000 n=19+20) It also yields a slight (0.5 - 1.0 microsecond) reduction in CPU time for fullstack unary pingpong: BM_UnaryPingPong<TCP, NoOpMutator, NoOpMutator>/0/512 [polls/iter:3.0001 ] 23.9µs ± 2% 23.0µs ± 1% -3.63% (p=0.002 n=6+6) BM_UnaryPingPong<TCP, NoOpMutator, NoOpMutator>/0/32768 [polls/iter:3.00015 ] 35.1µs ± 1% 34.2µs ± 1% -2.57% (p=0.036 n=5+3) BM_UnaryPingPong<MinTCP, NoOpMutator, NoOpMutator>/8/0 [polls/iter:3.00011 ] 21.7µs ± 3% 21.2µs ± 2% -2.44% (p=0.017 n=6+5)
Arjun Roy