session/redis: improve hash index calculation (#738)

Author: nomand-zc

session/redis/go.mod

@@ -11,7 +11,6 @@ require (
 	github.com/alicebob/miniredis/v2 v2.35.0
 	github.com/google/uuid v1.6.0
 	github.com/redis/go-redis/v9 v9.11.0
-	github.com/spaolacci/murmur3 v1.1.0
 	github.com/stretchr/testify v1.10.0
 	trpc.group/trpc-go/trpc-agent-go v0.2.0
 	trpc.group/trpc-go/trpc-agent-go/storage/redis v0.0.3
@@ -22,6 +21,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/yuin/gopher-lua v1.1.1 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect

session/redis/service.go

@@ -21,7 +21,6 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/redis/go-redis/v9"
-	"github.com/spaolacci/murmur3"
 	"trpc.group/trpc-go/trpc-agent-go/event"
 	"trpc.group/trpc-go/trpc-agent-go/log"
 	"trpc.group/trpc-go/trpc-agent-go/session"
@@ -488,9 +487,7 @@ func (s *Service) AppendTrackEvent(
 				panic(r)
 			}
 		}()
-		trackKey := getTrackKey(key, trackEvent.Track)
-		n := len(s.trackEventChans)
-		index := int(murmur3.Sum32([]byte(trackKey))) % n
+		index := sess.Hash % len(s.trackEventChans)
 		select {
 		case s.trackEventChans[index] <- &trackEventPair{key: key, event: trackEvent}:
 		case <-ctx.Done():