p2p: use slices package for sorting ethereum#27494

Author: gzliudan

p2p/discover/ntp.go

@@ -22,7 +22,7 @@ package discover
 import (
 	"fmt"
 	"net"
-	"sort"
+	"slices"
 	"time"
 
 	"github.com/XinFinOrg/XDPoSChain/log"
@@ -33,14 +33,6 @@ const (
 	ntpChecks = 3              // Number of measurements to do against the NTP server
 )
 
-// durationSlice attaches the methods of sort.Interface to []time.Duration,
-// sorting in increasing order.
-type durationSlice []time.Duration
-
-func (s durationSlice) Len() int           { return len(s) }
-func (s durationSlice) Less(i, j int) bool { return s[i] < s[j] }
-func (s durationSlice) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
-
 // checkClockDrift queries an NTP server for clock drifts and warns the user if
 // one large enough is detected.
 func checkClockDrift() {
@@ -109,7 +101,7 @@ func sntpDrift(measurements int) (time.Duration, error) {
 		drifts = append(drifts, sent.Sub(t)+elapsed/2)
 	}
 	// Calculate average drif (drop two extremities to avoid outliers)
-	sort.Sort(durationSlice(drifts))
+	slices.Sort(drifts)
 
 	drift := time.Duration(0)
 	for i := 1; i < len(drifts)-1; i++ {

p2p/discv5/ticket.go

@@ -336,8 +336,6 @@ func (s *ticketStore) addTicketRef(r ticketRef) {
 		tickets.nextLookup = min
 	}
 	tickets.nextLookup += mclock.AbsTime(collectFrequency)
-
-	//s.removeExcessTickets(topic)
 }
 
 func (s *ticketStore) nextFilteredTicket() (*ticketRef, time.Duration) {
@@ -393,7 +391,6 @@ func (s *ticketStore) nextRegisterableTicket() (*ticketRef, time.Duration) {
 			nextTicket ticketRef // uninitialized if this bucket is empty
 		)
 		for _, tickets := range s.tickets {
-			//s.removeExcessTickets(topic)
 			if len(tickets.buckets) != 0 {
 				empty = false
 

p2p/peer.go

@@ -21,7 +21,7 @@ import (
 	"fmt"
 	"io"
 	"net"
-	"sort"
+	"slices"
 	"sync"
 	"time"
 
@@ -329,7 +329,7 @@ func countMatchingProtocols(protocols []Protocol, caps []Cap) int {
 
 // matchProtocols creates structures for matching named subprotocols.
 func matchProtocols(protocols []Protocol, caps []Cap, rw MsgReadWriter) map[string]*protoRW {
-	sort.Sort(capsByNameAndVersion(caps))
+	slices.SortFunc(caps, Cap.Cmp)
 	offset := baseProtocolLength
 	result := make(map[string]*protoRW)
 

p2p/protocol.go

@@ -17,7 +17,9 @@
 package p2p
 
 import (
+	"cmp"
 	"fmt"
+	"strings"
 
 	"github.com/XinFinOrg/XDPoSChain/p2p/discover"
 )
@@ -72,10 +74,10 @@ func (cap Cap) String() string {
 	return fmt.Sprintf("%s/%d", cap.Name, cap.Version)
 }
 
-type capsByNameAndVersion []Cap
-
-func (cs capsByNameAndVersion) Len() int      { return len(cs) }
-func (cs capsByNameAndVersion) Swap(i, j int) { cs[i], cs[j] = cs[j], cs[i] }
-func (cs capsByNameAndVersion) Less(i, j int) bool {
-	return cs[i].Name < cs[j].Name || (cs[i].Name == cs[j].Name && cs[i].Version < cs[j].Version)
+// Cmp defines the canonical sorting order of capabilities.
+func (cap Cap) Cmp(other Cap) int {
+	if cap.Name == other.Name {
+		return cmp.Compare(cap.Version, other.Version)
+	}
+	return strings.Compare(cap.Name, other.Name)
 }