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speed up marshaling of transport parameters (#3531)

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The speedup comes from multiple sources:
1. We now preallocate a byte slice, instead of appending multiple times.
2. Marshaling into a byte slice is faster than using a bytes.Buffer.
3. quicvarint.Write allocates, while quicvarint.Append doesn't.
This commit is contained in:
Marten Seemann 2022-08-29 23:05:52 +03:00 • committed by GitHub
parent 3f1adfd822
commit 7023b52e13
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6 changed files with 74 additions and 78 deletions
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9
internal/handshake/crypto_setup.go
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@ -432,11 +432,10 @@ func (h *cryptoSetup) handleTransportParameters(data []byte) {
// must be called after receiving the transport parameters
func (h *cryptoSetup) marshalDataForSessionState() []byte {
buf := &bytes.Buffer{}
quicvarint.Write(buf, clientSessionStateRevision)
quicvarint.Write(buf, uint64(h.rttStats.SmoothedRTT().Microseconds()))
h.peerParams.MarshalForSessionTicket(buf)
return buf.Bytes()
b := make([]byte, 0, 256)
b = quicvarint.Append(b, clientSessionStateRevision)
b = quicvarint.Append(b, uint64(h.rttStats.SmoothedRTT().Microseconds()))
return h.peerParams.MarshalForSessionTicket(b)
}
func (h *cryptoSetup) handleDataFromSessionState(data []byte) {