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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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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 74 additions and 78 deletions
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5
fuzzing/transportparameters/cmd/corpus.go
View file

@ -1,7 +1,6 @@
package main
import (
"bytes"
"log"
"math"
"math/rand"
@ -78,9 +77,7 @@ func main() {
}
data = tp.Marshal(pers)
} else {
b := &bytes.Buffer{}
tp.MarshalForSessionTicket(b)
data = b.Bytes()
data = tp.MarshalForSessionTicket(nil)
}
if err := helper.WriteCorpusFileWithPrefix("corpus", data, transportparameters.PrefixLen); err != nil {
log.Fatal(err)

5
fuzzing/transportparameters/fuzz.go
View file

@ -51,10 +51,9 @@ func fuzzTransportParametersForSessionTicket(data []byte) int {
if err := tp.UnmarshalFromSessionTicket(bytes.NewReader(data)); err != nil {
return 0
}
buf := &bytes.Buffer{}
tp.MarshalForSessionTicket(buf)
b := tp.MarshalForSessionTicket(nil)
tp2 := &wire.TransportParameters{}
if err := tp2.UnmarshalFromSessionTicket(bytes.NewReader(buf.Bytes())); err != nil {
if err := tp2.UnmarshalFromSessionTicket(bytes.NewReader(b)); err != nil {
panic(err)
}
return 1