feat(wantlist): remove an unnecessary allocation

We allocate a _lot_ of these.

decision/bench_test.go

@@ -25,6 +25,6 @@ func BenchmarkTaskQueuePush(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		c := cid.NewCidV0(u.Hash([]byte(fmt.Sprint(i))))
 
-		q.Push(peers[i%len(peers)], &wantlist.Entry{Cid: c, Priority: math.MaxInt32})
+		q.Push(peers[i%len(peers)], wantlist.Entry{Cid: c, Priority: math.MaxInt32})
 	}
 }

decision/engine.go

@@ -107,7 +107,7 @@ func NewEngine(ctx context.Context, bs bstore.Blockstore) *Engine {
 	return e
 }
 
-func (e *Engine) WantlistForPeer(p peer.ID) (out []*wl.Entry) {
+func (e *Engine) WantlistForPeer(p peer.ID) (out []wl.Entry) {
 	partner := e.findOrCreate(p)
 	partner.lk.Lock()
 	defer partner.lk.Unlock()
@@ -241,7 +241,7 @@ func (e *Engine) MessageReceived(p peer.ID, m bsmsg.BitSwapMessage) error {
 	}
 
 	var msgSize int
-	var activeEntries []*wl.Entry
+	var activeEntries []wl.Entry
 	for _, entry := range m.Wantlist() {
 		if entry.Cancel {
 			log.Debugf("%s cancel %s", p, entry.Cid)
@@ -261,7 +261,7 @@ func (e *Engine) MessageReceived(p peer.ID, m bsmsg.BitSwapMessage) error {
 				newWorkExists = true
 				if msgSize+blockSize > maxMessageSize {
 					e.peerRequestQueue.Push(p, activeEntries...)
-					activeEntries = []*wl.Entry{}
+					activeEntries = []wl.Entry{}
 					msgSize = 0
 				}
 				activeEntries = append(activeEntries, entry.Entry)

decision/ledger.go

@@ -85,7 +85,7 @@ func (l *ledger) CancelWant(k cid.Cid) {
 	l.wantList.Remove(k)
 }
 
-func (l *ledger) WantListContains(k cid.Cid) (*wl.Entry, bool) {
+func (l *ledger) WantListContains(k cid.Cid) (wl.Entry, bool) {
 	return l.wantList.Contains(k)
 }
 

decision/peer_request_queue.go

@@ -14,7 +14,7 @@ import (
 type peerRequestQueue interface {
 	// Pop returns the next peerRequestTask. Returns nil if the peerRequestQueue is empty.
 	Pop() *peerRequestTask
-	Push(to peer.ID, entries ...*wantlist.Entry)
+	Push(to peer.ID, entries ...wantlist.Entry)
 	Remove(k cid.Cid, p peer.ID)
 
 	// NB: cannot expose simply expose taskQueue.Len because trashed elements
@@ -46,7 +46,7 @@ type prq struct {
 }
 
 // Push currently adds a new peerRequestTask to the end of the list.
-func (tl *prq) Push(to peer.ID, entries ...*wantlist.Entry) {
+func (tl *prq) Push(to peer.ID, entries ...wantlist.Entry) {
 	tl.lock.Lock()
 	defer tl.lock.Unlock()
 	partner, ok := tl.partners[to]
@@ -198,7 +198,7 @@ func (tl *prq) thawRound() {
 }
 
 type peerRequestTaskEntry struct {
-	*wantlist.Entry
+	wantlist.Entry
 	// trash in a book-keeping field
 	trash bool
 }

decision/peer_request_queue_test.go

@@ -45,7 +45,7 @@ func TestPushPop(t *testing.T) {
 		t.Log(partner.String())
 
 		c := cid.NewCidV0(u.Hash([]byte(letter)))
-		prq.Push(partner, &wantlist.Entry{Cid: c, Priority: math.MaxInt32 - index})
+		prq.Push(partner, wantlist.Entry{Cid: c, Priority: math.MaxInt32 - index})
 	}
 	for _, consonant := range consonants {
 		c := cid.NewCidV0(u.Hash([]byte(consonant)))
@@ -87,10 +87,10 @@ func TestPeerRepeats(t *testing.T) {
 
 	for i := 0; i < 5; i++ {
 		elcid := cid.NewCidV0(u.Hash([]byte(fmt.Sprint(i))))
-		prq.Push(a, &wantlist.Entry{Cid: elcid})
-		prq.Push(b, &wantlist.Entry{Cid: elcid})
-		prq.Push(c, &wantlist.Entry{Cid: elcid})
-		prq.Push(d, &wantlist.Entry{Cid: elcid})
+		prq.Push(a, wantlist.Entry{Cid: elcid})
+		prq.Push(b, wantlist.Entry{Cid: elcid})
+		prq.Push(c, wantlist.Entry{Cid: elcid})
+		prq.Push(d, wantlist.Entry{Cid: elcid})
 	}
 
 	// now, pop off four entries, there should be one from each

message/message.go

@@ -66,7 +66,7 @@ func newMsg(full bool) *impl {
 }
 
 type Entry struct {
-	*wantlist.Entry
+	wantlist.Entry
 	Cancel bool
 }
 
@@ -150,7 +150,7 @@ func (m *impl) addEntry(c cid.Cid, priority int, cancel bool) {
 		e.Cancel = cancel
 	} else {
 		m.wantlist[c] = &Entry{
-			Entry: &wantlist.Entry{
+			Entry: wantlist.Entry{
 				Cid:      c,
 				Priority: priority,
 			},

wantlist/wantlist.go

@@ -13,7 +13,7 @@ type SessionTrackedWantlist struct {
 }
 
 type Wantlist struct {
-	set map[cid.Cid]*Entry
+	set map[cid.Cid]Entry
 }
 
 type Entry struct {
@@ -22,19 +22,19 @@ type Entry struct {
 }
 
 type sessionTrackedEntry struct {
-	*Entry
+	Entry
 	sesTrk map[uint64]struct{}
 }
 
 // NewRefEntry creates a new reference tracked wantlist entry.
-func NewRefEntry(c cid.Cid, p int) *Entry {
-	return &Entry{
+func NewRefEntry(c cid.Cid, p int) Entry {
+	return Entry{
 		Cid:      c,
 		Priority: p,
 	}
 }
 
-type entrySlice []*Entry
+type entrySlice []Entry
 
 func (es entrySlice) Len() int           { return len(es) }
 func (es entrySlice) Swap(i, j int)      { es[i], es[j] = es[j], es[i] }
@@ -48,7 +48,7 @@ func NewSessionTrackedWantlist() *SessionTrackedWantlist {
 
 func New() *Wantlist {
 	return &Wantlist{
-		set: make(map[cid.Cid]*Entry),
+		set: make(map[cid.Cid]Entry),
 	}
 }
 
@@ -68,7 +68,7 @@ func (w *SessionTrackedWantlist) Add(c cid.Cid, priority int, ses uint64) bool {
 	}
 
 	w.set[c] = &sessionTrackedEntry{
-		Entry:  &Entry{Cid: c, Priority: priority},
+		Entry:  Entry{Cid: c, Priority: priority},
 		sesTrk: map[uint64]struct{}{ses: struct{}{}},
 	}
 
@@ -76,7 +76,7 @@ func (w *SessionTrackedWantlist) Add(c cid.Cid, priority int, ses uint64) bool {
 }
 
 // AddEntry adds given Entry to the wantlist. For more information see Add method.
-func (w *SessionTrackedWantlist) AddEntry(e *Entry, ses uint64) bool {
+func (w *SessionTrackedWantlist) AddEntry(e Entry, ses uint64) bool {
 	if ex, ok := w.set[e.Cid]; ok {
 		ex.sesTrk[ses] = struct{}{}
 		return false
@@ -108,23 +108,23 @@ func (w *SessionTrackedWantlist) Remove(c cid.Cid, ses uint64) bool {
 
 // Contains returns true if the given cid is in the wantlist tracked by one or
 // more sessions.
-func (w *SessionTrackedWantlist) Contains(k cid.Cid) (*Entry, bool) {
+func (w *SessionTrackedWantlist) Contains(k cid.Cid) (Entry, bool) {
 	e, ok := w.set[k]
 	if !ok {
-		return nil, false
+		return Entry{}, false
 	}
 	return e.Entry, true
 }
 
-func (w *SessionTrackedWantlist) Entries() []*Entry {
-	es := make([]*Entry, 0, len(w.set))
+func (w *SessionTrackedWantlist) Entries() []Entry {
+	es := make([]Entry, 0, len(w.set))
 	for _, e := range w.set {
 		es = append(es, e.Entry)
 	}
 	return es
 }
 
-func (w *SessionTrackedWantlist) SortedEntries() []*Entry {
+func (w *SessionTrackedWantlist) SortedEntries() []Entry {
 	es := w.Entries()
 	sort.Sort(entrySlice(es))
 	return es
@@ -151,7 +151,7 @@ func (w *Wantlist) Add(c cid.Cid, priority int) bool {
 		return false
 	}
 
-	w.set[c] = &Entry{
+	w.set[c] = Entry{
 		Cid:      c,
 		Priority: priority,
 	}
@@ -159,7 +159,7 @@ func (w *Wantlist) Add(c cid.Cid, priority int) bool {
 	return true
 }
 
-func (w *Wantlist) AddEntry(e *Entry) bool {
+func (w *Wantlist) AddEntry(e Entry) bool {
 	if _, ok := w.set[e.Cid]; ok {
 		return false
 	}
@@ -177,20 +177,20 @@ func (w *Wantlist) Remove(c cid.Cid) bool {
 	return true
 }
 
-func (w *Wantlist) Contains(c cid.Cid) (*Entry, bool) {
+func (w *Wantlist) Contains(c cid.Cid) (Entry, bool) {
 	e, ok := w.set[c]
 	return e, ok
 }
 
-func (w *Wantlist) Entries() []*Entry {
-	es := make([]*Entry, 0, len(w.set))
+func (w *Wantlist) Entries() []Entry {
+	es := make([]Entry, 0, len(w.set))
 	for _, e := range w.set {
 		es = append(es, e)
 	}
 	return es
 }
 
-func (w *Wantlist) SortedEntries() []*Entry {
+func (w *Wantlist) SortedEntries() []Entry {
 	es := w.Entries()
 	sort.Sort(entrySlice(es))
 	return es

wantlist/wantlist_test.go

@@ -25,7 +25,7 @@ func init() {
 }
 
 type wli interface {
-	Contains(cid.Cid) (*Entry, bool)
+	Contains(cid.Cid) (Entry, bool)
 }
 
 func assertHasCid(t *testing.T, w wli, c cid.Cid) {

wantmanager/wantmanager.go

@@ -100,8 +100,8 @@ func (wm *WantManager) IsWanted(c cid.Cid) bool {
 }
 
 // CurrentWants returns the list of current wants.
-func (wm *WantManager) CurrentWants() []*wantlist.Entry {
-	resp := make(chan []*wantlist.Entry, 1)
+func (wm *WantManager) CurrentWants() []wantlist.Entry {
+	resp := make(chan []wantlist.Entry, 1)
 	select {
 	case wm.wantMessages <- &currentWantsMessage{resp}:
 	case <-wm.ctx.Done():
@@ -116,8 +116,8 @@ func (wm *WantManager) CurrentWants() []*wantlist.Entry {
 }
 
 // CurrentBroadcastWants returns the current list of wants that are broadcasts.
-func (wm *WantManager) CurrentBroadcastWants() []*wantlist.Entry {
-	resp := make(chan []*wantlist.Entry, 1)
+func (wm *WantManager) CurrentBroadcastWants() []wantlist.Entry {
+	resp := make(chan []wantlist.Entry, 1)
 	select {
 	case wm.wantMessages <- &currentBroadcastWantsMessage{resp}:
 	case <-wm.ctx.Done():
@@ -246,7 +246,7 @@ func (iwm *isWantedMessage) handle(wm *WantManager) {
 }
 
 type currentWantsMessage struct {
-	resp chan<- []*wantlist.Entry
+	resp chan<- []wantlist.Entry
 }
 
 func (cwm *currentWantsMessage) handle(wm *WantManager) {
@@ -254,7 +254,7 @@ func (cwm *currentWantsMessage) handle(wm *WantManager) {
 }
 
 type currentBroadcastWantsMessage struct {
-	resp chan<- []*wantlist.Entry
+	resp chan<- []wantlist.Entry
 }
 
 func (cbcwm *currentBroadcastWantsMessage) handle(wm *WantManager) {