internal/ethapi, les: use slices package for sorting (#27492)

Co-authored-by: Felix Lange <fjl@twurst.com>

internal/ethapi/api_test.go

@@ -17,7 +17,6 @@
 package ethapi
 
 import (
-	"bytes"
 	"context"
 	"crypto/ecdsa"
 	"encoding/json"
@@ -25,7 +24,6 @@ import (
 	"hash"
 	"math/big"
 	"reflect"
-	"sort"
 	"testing"
 	"time"
 
@@ -48,6 +46,7 @@ import (
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/stretchr/testify/require"
 	"golang.org/x/crypto/sha3"
+	"golang.org/x/exp/slices"
 )
 
 func TestTransaction_RoundTripRpcJSON(t *testing.T) {
@@ -649,19 +648,13 @@ type Account struct {
 	addr common.Address
 }
 
-type Accounts []Account
-
-func (a Accounts) Len() int           { return len(a) }
-func (a Accounts) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
-func (a Accounts) Less(i, j int) bool { return bytes.Compare(a[i].addr.Bytes(), a[j].addr.Bytes()) < 0 }
-
-func newAccounts(n int) (accounts Accounts) {
+func newAccounts(n int) (accounts []Account) {
 	for i := 0; i < n; i++ {
 		key, _ := crypto.GenerateKey()
 		addr := crypto.PubkeyToAddress(key.PublicKey)
 		accounts = append(accounts, Account{key: key, addr: addr})
 	}
-	sort.Sort(accounts)
+	slices.SortFunc(accounts, func(a, b Account) bool { return a.addr.Less(b.addr) })
 	return accounts
 }
 

les/servingqueue.go

@@ -17,12 +17,12 @@
 package les
 
 import (
-	"sort"
 	"sync"
 	"sync/atomic"
 
 	"github.com/ethereum/go-ethereum/common/mclock"
 	"github.com/ethereum/go-ethereum/common/prque"
+	"golang.org/x/exp/slices"
 )
 
 // servingQueue allows running tasks in a limited number of threads and puts the
@@ -180,35 +180,19 @@ func (sq *servingQueue) threadController() {
 	}
 }
 
-type (
-	// peerTasks lists the tasks received from a given peer when selecting peers to freeze
-	peerTasks struct {
-		peer     *clientPeer
-		list     []*servingTask
-		sumTime  uint64
-		priority float64
-	}
-	// peerList is a sortable list of peerTasks
-	peerList []*peerTasks
-)
-
-func (l peerList) Len() int {
-	return len(l)
-}
-
-func (l peerList) Less(i, j int) bool {
-	return l[i].priority < l[j].priority
-}
-
-func (l peerList) Swap(i, j int) {
-	l[i], l[j] = l[j], l[i]
+// peerTasks lists the tasks received from a given peer when selecting peers to freeze
+type peerTasks struct {
+	peer     *clientPeer
+	list     []*servingTask
+	sumTime  uint64
+	priority float64
 }
 
 // freezePeers selects the peers with the worst priority queued tasks and freezes
 // them until burstTime goes under burstDropLimit or all peers are frozen
 func (sq *servingQueue) freezePeers() {
 	peerMap := make(map[*clientPeer]*peerTasks)
-	var peerList peerList
+	var peerList []*peerTasks
 	if sq.best != nil {
 		sq.queue.Push(sq.best, sq.best.priority)
 	}
@@ -231,7 +215,9 @@ func (sq *servingQueue) freezePeers() {
 		tasks.list = append(tasks.list, task)
 		tasks.sumTime += task.expTime
 	}
-	sort.Sort(peerList)
+	slices.SortFunc(peerList, func(a, b *peerTasks) bool {
+		return a.priority < b.priority
+	})
 	drop := true
 	for _, tasks := range peerList {
 		if drop {

les/utils/limiter.go

@@ -17,10 +17,10 @@
 package utils
 
 import (
-	"sort"
 	"sync"
 
 	"github.com/ethereum/go-ethereum/p2p/enode"
+	"golang.org/x/exp/slices"
 )
 
 const maxSelectionWeight = 1000000000 // maximum selection weight of each individual node/address group
@@ -340,24 +340,9 @@ func (l *Limiter) Stop() {
 	l.cond.Signal()
 }
 
-type (
-	dropList     []dropListItem
-	dropListItem struct {
-		nq       *nodeQueue
-		priority float64
-	}
-)
-
-func (l dropList) Len() int {
-	return len(l)
-}
-
-func (l dropList) Less(i, j int) bool {
-	return l[i].priority < l[j].priority
-}
-
-func (l dropList) Swap(i, j int) {
-	l[i], l[j] = l[j], l[i]
+type dropListItem struct {
+	nq       *nodeQueue
+	priority float64
 }
 
 // dropRequests selects the nodes with the highest queued request cost to selection
@@ -366,7 +351,7 @@ func (l dropList) Swap(i, j int) {
 func (l *Limiter) dropRequests() {
 	var (
 		sumValue float64
-		list     dropList
+		list     []dropListItem
 	)
 	for _, nq := range l.nodes {
 		sumValue += nq.value
@@ -384,7 +369,9 @@ func (l *Limiter) dropRequests() {
 			priority: w / float64(nq.sumCost),
 		})
 	}
-	sort.Sort(list)
+	slices.SortFunc(list, func(a, b dropListItem) bool {
+		return a.priority < b.priority
+	})
 	for _, item := range list {
 		for _, request := range item.nq.queue {
 			close(request.process)