From 875ca9c48a9f1077a85b413149e2d2d2fce06116 Mon Sep 17 00:00:00 2001
From: Mikhail Rakhmanov <rakhmanov.m@gmail.com>
Date: Mon, 31 Mar 2025 22:05:52 +0200
Subject: [PATCH] Benchmarks and snappy

---
 app/ldiff/diff.go                             |   1 +
 app/ldiff/mock_ldiff/mock_ldiff.go            |  15 +
 app/olddiff/diff.go                           |   1 -
 commonspace/headsync/diffsyncer_test.go       |   4 +-
 commonspace/headsync/headsync_test.go         |   6 +-
 commonspace/headsync/remotediff.go            |  34 ++
 commonspace/headsync/remotediff_test.go       |  98 ++--
 .../spacesyncproto/protos/spacesync.proto     |   5 +
 commonspace/spacesyncproto/spacesync.pb.go    | 455 ++++++++++++++----
 go.mod                                        |   1 +
 go.sum                                        |   2 +
 11 files changed, 482 insertions(+), 140 deletions(-)

diff --git a/app/ldiff/diff.go b/app/ldiff/diff.go
index 113c742c..0844bdf9 100644
--- a/app/ldiff/diff.go
+++ b/app/ldiff/diff.go
@@ -331,6 +331,7 @@ func (d *diff) compareResults(dctx *diffCtx, r Range, myRes, otherRes RangeResul
 		return
 	}
 	if otherRes.Count <= d.compareThreshold && len(otherRes.Elements) == 0 || len(myRes.Elements) == myRes.Count {
+		//fmt.Println(otherRes.Count, len(myRes.Elements), myRes.Count)
 		r.Elements = true
 		dctx.prepare = append(dctx.prepare, r)
 		return
diff --git a/app/ldiff/mock_ldiff/mock_ldiff.go b/app/ldiff/mock_ldiff/mock_ldiff.go
index f26cba47..2989e969 100644
--- a/app/ldiff/mock_ldiff/mock_ldiff.go
+++ b/app/ldiff/mock_ldiff/mock_ldiff.go
@@ -13,6 +13,7 @@ import (
 	reflect "reflect"
 
 	ldiff "github.com/anyproto/any-sync/app/ldiff"
+	spacesyncproto "github.com/anyproto/any-sync/commonspace/spacesyncproto"
 	gomock "go.uber.org/mock/gomock"
 )
 
@@ -56,6 +57,20 @@ func (mr *MockDiffMockRecorder) Diff(arg0, arg1 any) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Diff", reflect.TypeOf((*MockDiff)(nil).Diff), arg0, arg1)
 }
 
+// DiffType mocks base method.
+func (m *MockDiff) DiffType() spacesyncproto.DiffType {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "DiffType")
+	ret0, _ := ret[0].(spacesyncproto.DiffType)
+	return ret0
+}
+
+// DiffType indicates an expected call of DiffType.
+func (mr *MockDiffMockRecorder) DiffType() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "DiffType", reflect.TypeOf((*MockDiff)(nil).DiffType))
+}
+
 // Element mocks base method.
 func (m *MockDiff) Element(arg0 string) (ldiff.Element, error) {
 	m.ctrl.T.Helper()
diff --git a/app/olddiff/diff.go b/app/olddiff/diff.go
index a71c50d3..11f1bb22 100644
--- a/app/olddiff/diff.go
+++ b/app/olddiff/diff.go
@@ -1,4 +1,3 @@
-//go:generate mockgen -destination mock_olddiff/mock_olddiff.go github.com/anyproto/any-sync/app/olddiff Diff,Remote
 package olddiff
 
 import (
diff --git a/commonspace/headsync/diffsyncer_test.go b/commonspace/headsync/diffsyncer_test.go
index fd499a36..7796e238 100644
--- a/commonspace/headsync/diffsyncer_test.go
+++ b/commonspace/headsync/diffsyncer_test.go
@@ -135,7 +135,7 @@ func TestDiffSyncer(t *testing.T) {
 		deletedId := "id"
 		fx.diffMock.EXPECT().RemoveId(deletedId).Return(nil)
 		fx.diffMock.EXPECT().Hash().Return("hash")
-		fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
+		//fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
 		upd := headstorage.DeletedStatusDeleted
 		fx.diffSyncer.updateHeads(headstorage.HeadsUpdate{
 			Id:            "id",
@@ -154,7 +154,7 @@ func TestDiffSyncer(t *testing.T) {
 			Id:   updatedId,
 			Head: "head",
 		})
-		fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
+		//fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
 		fx.diffSyncer.updateHeads(headstorage.HeadsUpdate{
 			Id:    "id",
 			Heads: []string{"head"},
diff --git a/commonspace/headsync/headsync_test.go b/commonspace/headsync/headsync_test.go
index 731d3b21..a113f7a0 100644
--- a/commonspace/headsync/headsync_test.go
+++ b/commonspace/headsync/headsync_test.go
@@ -144,7 +144,7 @@ func (fx *headSyncFixture) init(t *testing.T) {
 	fx.headStorage.EXPECT().AddObserver(gomock.Any())
 	err := fx.headSync.Init(fx.app)
 	require.NoError(t, err)
-	fx.headSync.diff = fx.diffMock
+	//fx.headSync.diff = fx.diffMock
 }
 
 func (fx *headSyncFixture) stop() {
@@ -194,7 +194,7 @@ func TestHeadSync(t *testing.T) {
 			Head: "headId",
 		})
 		fx.diffMock.EXPECT().Hash().Return("hash")
-		fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
+		//fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
 		fx.diffSyncerMock.EXPECT().Sync(gomock.Any()).Return(nil)
 		fx.diffSyncerMock.EXPECT().Close()
 		err := fx.headSync.Run(ctx)
@@ -240,7 +240,7 @@ func TestHeadSync(t *testing.T) {
 			Head: "headId",
 		})
 		fx.diffMock.EXPECT().Hash().Return("hash")
-		fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
+		//fx.stateStorage.EXPECT().SetHash(gomock.Any(), "hash").Return(nil)
 		fx.diffSyncerMock.EXPECT().Sync(gomock.Any()).Return(nil)
 		fx.diffSyncerMock.EXPECT().Close()
 		err := fx.headSync.Run(ctx)
diff --git a/commonspace/headsync/remotediff.go b/commonspace/headsync/remotediff.go
index f50708bf..3c623689 100644
--- a/commonspace/headsync/remotediff.go
+++ b/commonspace/headsync/remotediff.go
@@ -6,6 +6,8 @@ import (
 	"encoding/hex"
 	"math"
 
+	"github.com/golang/snappy"
+
 	"github.com/anyproto/any-sync/app/ldiff"
 	"github.com/anyproto/any-sync/commonspace/spacesyncproto"
 )
@@ -52,6 +54,17 @@ func (r *remote) Ranges(ctx context.Context, ranges []ldiff.Range, resBuf []ldif
 	if err != nil {
 		return
 	}
+	if resp.EncodedResult != nil {
+		encoded := &spacesyncproto.EncodedHeadSyncResults{}
+		decodedBytes, err := snappy.Decode(nil, resp.EncodedResult)
+		if err != nil {
+			return nil, err
+		}
+		if err = encoded.Unmarshal(decodedBytes); err != nil {
+			return nil, err
+		}
+		resp.Results = encoded.Results
+	}
 	for _, rr := range resp.Results {
 		var elms []ldiff.Element
 		if len(rr.Elements) > 0 {
@@ -82,6 +95,17 @@ func (r *remote) DiffTypeCheck(ctx context.Context, diffContainer ldiff.DiffCont
 	if err != nil {
 		return
 	}
+	if resp.EncodedResult != nil {
+		encoded := &spacesyncproto.EncodedHeadSyncResults{}
+		decodedBytes, err := snappy.Decode(nil, resp.EncodedResult)
+		if err != nil {
+			return false, nil, err
+		}
+		if err = encoded.Unmarshal(decodedBytes); err != nil {
+			return false, nil, err
+		}
+		resp.Results = encoded.Results
+	}
 	needsSync = true
 	checkHash := func(diff ldiff.Diff) (bool, error) {
 		hashB, err := hex.DecodeString(diff.Hash())
@@ -141,6 +165,16 @@ func HandleRangeRequest(ctx context.Context, d ldiff.Diff, req *spacesyncproto.H
 			Count:    uint32(rangeRes.Count),
 		})
 	}
+	if d.DiffType() == spacesyncproto.DiffType_V2 {
+		encoded := spacesyncproto.EncodedHeadSyncResults{Results: resp.Results}
+		resp.Results = nil
+		encodedBytes, err := encoded.Marshal()
+		if err != nil {
+			return nil, err
+		}
+		encodedBytes = snappy.Encode(nil, encodedBytes)
+		resp.EncodedResult = encodedBytes
+	}
 	resp.DiffType = d.DiffType()
 	return
 }
diff --git a/commonspace/headsync/remotediff_test.go b/commonspace/headsync/remotediff_test.go
index 24ff0bb6..71f17197 100644
--- a/commonspace/headsync/remotediff_test.go
+++ b/commonspace/headsync/remotediff_test.go
@@ -2,6 +2,7 @@ package headsync
 
 import (
 	"context"
+	"crypto/rand"
 	"fmt"
 	"testing"
 
@@ -12,43 +13,84 @@ import (
 	"github.com/anyproto/any-sync/commonspace/spacesyncproto"
 )
 
-func TestRemote(t *testing.T) {
-	contLocal := ldiff.New(32, 256)
-	contRemote := ldiff.New(32, 256)
+func benchmarkDifferentDiffs(t *testing.T, diffFactory func() ldiff.Diff, headLength int) {
+	moduloValues := []int{1, 10, 100, 1000, 10000, 100000}
+	totalElements := 1000000
 
-	test := func(t *testing.T, ldLocal, ldRemote ldiff.Diff) {
-		var (
-			localEls  []ldiff.Element
-			remoteEls []ldiff.Element
-		)
+	for _, modVal := range moduloValues {
+		t.Run(fmt.Sprintf("New_%d", totalElements/modVal), func(t *testing.T) {
+			// Create a new diff instance for each test using the factory
+			contLocal := diffFactory()
+			contRemote := diffFactory()
+			remClient := &mockClient{t: t, l: contRemote}
 
-		for i := 0; i < 100000; i++ {
-			el := ldiff.Element{
-				Id:   fmt.Sprint(i),
-				Head: fmt.Sprint(i),
+			var (
+				localEls  []ldiff.Element
+				remoteEls []ldiff.Element
+			)
+
+			buf := make([]byte, headLength)
+			_, _ = rand.Read(buf)
+
+			for i := 0; i < totalElements; i++ {
+				el := ldiff.Element{
+					Id:   fmt.Sprint(i),
+					Head: string(buf),
+				}
+				remoteEls = append(remoteEls, el)
+				if i%modVal != 0 {
+					localEls = append(localEls, el)
+				}
 			}
-			remoteEls = append(remoteEls, el)
-			if i%100 == 0 {
-				localEls = append(localEls, el)
-			}
-		}
-		ldLocal.Set(localEls...)
-		ldRemote.Set(remoteEls...)
 
-		rd := NewRemoteDiff("1", &mockClient{l: ldRemote})
-		newIds, changedIds, removedIds, err := ldLocal.Diff(context.Background(), rd)
-		require.NoError(t, err)
-		assert.Len(t, newIds, 99000)
-		assert.Len(t, changedIds, 0)
-		assert.Len(t, removedIds, 0)
+			contLocal.Set(localEls...)
+			remClient.l.Set(remoteEls...)
+
+			rd := NewRemoteDiff("1", remClient)
+			newIds, changedIds, removedIds, err := contLocal.Diff(context.Background(), rd)
+			require.NoError(t, err)
+
+			expectedNewCount := totalElements / modVal
+			assert.Len(t, newIds, expectedNewCount)
+			assert.Len(t, changedIds, 0)
+			assert.Len(t, removedIds, 0)
+
+			fmt.Printf("New count %d: total bytes sent: %d, %d\n", expectedNewCount, remClient.totalInSent, remClient.totalOutSent)
+		})
 	}
-	test(t, contLocal, contRemote)
+}
+
+func TestBenchRemoteWithDifferentCounts(t *testing.T) {
+	t.Run("StandardLdiff", func(t *testing.T) {
+		benchmarkDifferentDiffs(t, func() ldiff.Diff {
+			return ldiff.New(32, 256)
+		}, 32)
+	})
+	// old has higher head lengths because of hashes
+	//t.Run("OldLdiff", func(t *testing.T) {
+	//	benchmarkDifferentDiffs(t, func() ldiff.Diff {
+	//		return olddiff.New(32, 256)
+	//	}, 100)
+	//})
 }
 
 type mockClient struct {
-	l ldiff.Diff
+	l            ldiff.Diff
+	totalInSent  int
+	totalOutSent int
+	t            *testing.T
 }
 
 func (m *mockClient) HeadSync(ctx context.Context, in *spacesyncproto.HeadSyncRequest) (*spacesyncproto.HeadSyncResponse, error) {
-	return HandleRangeRequest(ctx, m.l, in)
+	res, err := in.Marshal()
+	require.NoError(m.t, err)
+	m.totalInSent += len(res)
+	resp, err := HandleRangeRequest(ctx, m.l, in)
+	if err != nil {
+		return nil, err
+	}
+	marsh, err := resp.Marshal()
+	require.NoError(m.t, err)
+	m.totalOutSent += len(marsh)
+	return resp, nil
 }
diff --git a/commonspace/spacesyncproto/protos/spacesync.proto b/commonspace/spacesyncproto/protos/spacesync.proto
index a0d893d6..2743004c 100644
--- a/commonspace/spacesyncproto/protos/spacesync.proto
+++ b/commonspace/spacesyncproto/protos/spacesync.proto
@@ -59,6 +59,10 @@ message HeadSyncResultElement {
     string head = 2;
 }
 
+message EncodedHeadSyncResults {
+    repeated HeadSyncResult results = 1;
+}
+
 // HeadSyncRequest is a request for HeadSync
 message HeadSyncRequest {
     string spaceId = 1;
@@ -70,6 +74,7 @@ message HeadSyncRequest {
 message HeadSyncResponse {
     repeated HeadSyncResult results = 1;
     DiffType diffType = 2;
+    bytes encodedResult = 3;
 }
 
 // ObjectSyncMessage is a message sent on object sync
diff --git a/commonspace/spacesyncproto/spacesync.pb.go b/commonspace/spacesyncproto/spacesync.pb.go
index f5bf4e66..a2bcfde3 100644
--- a/commonspace/spacesyncproto/spacesync.pb.go
+++ b/commonspace/spacesyncproto/spacesync.pb.go
@@ -336,6 +336,58 @@ func (m *HeadSyncResultElement) GetHead() string {
 	return ""
 }
 
+type EncodedHeadSyncResults struct {
+	Results []*HeadSyncResult `protobuf:"bytes,1,rep,name=results,proto3" json:"results,omitempty"`
+}
+
+func (m *EncodedHeadSyncResults) Reset()         { *m = EncodedHeadSyncResults{} }
+func (m *EncodedHeadSyncResults) String() string { return proto.CompactTextString(m) }
+func (*EncodedHeadSyncResults) ProtoMessage()    {}
+func (*EncodedHeadSyncResults) Descriptor() ([]byte, []int) {
+	return fileDescriptor_80e49f1f4ac27799, []int{3}
+}
+func (m *EncodedHeadSyncResults) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *EncodedHeadSyncResults) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_EncodedHeadSyncResults.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *EncodedHeadSyncResults) XXX_MarshalAppend(b []byte, newLen int) ([]byte, error) {
+	b = b[:newLen]
+	_, err := m.MarshalToSizedBuffer(b)
+	if err != nil {
+		return nil, err
+	}
+	return b, nil
+}
+func (m *EncodedHeadSyncResults) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EncodedHeadSyncResults.Merge(m, src)
+}
+func (m *EncodedHeadSyncResults) XXX_Size() int {
+	return m.Size()
+}
+func (m *EncodedHeadSyncResults) XXX_DiscardUnknown() {
+	xxx_messageInfo_EncodedHeadSyncResults.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EncodedHeadSyncResults proto.InternalMessageInfo
+
+func (m *EncodedHeadSyncResults) GetResults() []*HeadSyncResult {
+	if m != nil {
+		return m.Results
+	}
+	return nil
+}
+
 // HeadSyncRequest is a request for HeadSync
 type HeadSyncRequest struct {
 	SpaceId  string           `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
@@ -347,7 +399,7 @@ func (m *HeadSyncRequest) Reset()         { *m = HeadSyncRequest{} }
 func (m *HeadSyncRequest) String() string { return proto.CompactTextString(m) }
 func (*HeadSyncRequest) ProtoMessage()    {}
 func (*HeadSyncRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{3}
+	return fileDescriptor_80e49f1f4ac27799, []int{4}
 }
 func (m *HeadSyncRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -407,15 +459,16 @@ func (m *HeadSyncRequest) GetDiffType() DiffType {
 
 // HeadSyncResponse is a response for HeadSync
 type HeadSyncResponse struct {
-	Results  []*HeadSyncResult `protobuf:"bytes,1,rep,name=results,proto3" json:"results,omitempty"`
-	DiffType DiffType          `protobuf:"varint,2,opt,name=diffType,proto3,enum=spacesync.DiffType" json:"diffType,omitempty"`
+	Results       []*HeadSyncResult `protobuf:"bytes,1,rep,name=results,proto3" json:"results,omitempty"`
+	DiffType      DiffType          `protobuf:"varint,2,opt,name=diffType,proto3,enum=spacesync.DiffType" json:"diffType,omitempty"`
+	EncodedResult []byte            `protobuf:"bytes,3,opt,name=encodedResult,proto3" json:"encodedResult,omitempty"`
 }
 
 func (m *HeadSyncResponse) Reset()         { *m = HeadSyncResponse{} }
 func (m *HeadSyncResponse) String() string { return proto.CompactTextString(m) }
 func (*HeadSyncResponse) ProtoMessage()    {}
 func (*HeadSyncResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{4}
+	return fileDescriptor_80e49f1f4ac27799, []int{5}
 }
 func (m *HeadSyncResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -466,6 +519,13 @@ func (m *HeadSyncResponse) GetDiffType() DiffType {
 	return DiffType_Initial
 }
 
+func (m *HeadSyncResponse) GetEncodedResult() []byte {
+	if m != nil {
+		return m.EncodedResult
+	}
+	return nil
+}
+
 // ObjectSyncMessage is a message sent on object sync
 type ObjectSyncMessage struct {
 	SpaceId   string `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
@@ -479,7 +539,7 @@ func (m *ObjectSyncMessage) Reset()         { *m = ObjectSyncMessage{} }
 func (m *ObjectSyncMessage) String() string { return proto.CompactTextString(m) }
 func (*ObjectSyncMessage) ProtoMessage()    {}
 func (*ObjectSyncMessage) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{5}
+	return fileDescriptor_80e49f1f4ac27799, []int{6}
 }
 func (m *ObjectSyncMessage) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -561,7 +621,7 @@ func (m *SpacePushRequest) Reset()         { *m = SpacePushRequest{} }
 func (m *SpacePushRequest) String() string { return proto.CompactTextString(m) }
 func (*SpacePushRequest) ProtoMessage()    {}
 func (*SpacePushRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{6}
+	return fileDescriptor_80e49f1f4ac27799, []int{7}
 }
 func (m *SpacePushRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -620,7 +680,7 @@ func (m *SpacePushResponse) Reset()         { *m = SpacePushResponse{} }
 func (m *SpacePushResponse) String() string { return proto.CompactTextString(m) }
 func (*SpacePushResponse) ProtoMessage()    {}
 func (*SpacePushResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{7}
+	return fileDescriptor_80e49f1f4ac27799, []int{8}
 }
 func (m *SpacePushResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -666,7 +726,7 @@ func (m *SpacePullRequest) Reset()         { *m = SpacePullRequest{} }
 func (m *SpacePullRequest) String() string { return proto.CompactTextString(m) }
 func (*SpacePullRequest) ProtoMessage()    {}
 func (*SpacePullRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{8}
+	return fileDescriptor_80e49f1f4ac27799, []int{9}
 }
 func (m *SpacePullRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -719,7 +779,7 @@ func (m *SpacePullResponse) Reset()         { *m = SpacePullResponse{} }
 func (m *SpacePullResponse) String() string { return proto.CompactTextString(m) }
 func (*SpacePullResponse) ProtoMessage()    {}
 func (*SpacePullResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{9}
+	return fileDescriptor_80e49f1f4ac27799, []int{10}
 }
 func (m *SpacePullResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -776,7 +836,7 @@ func (m *SpacePayload) Reset()         { *m = SpacePayload{} }
 func (m *SpacePayload) String() string { return proto.CompactTextString(m) }
 func (*SpacePayload) ProtoMessage()    {}
 func (*SpacePayload) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{10}
+	return fileDescriptor_80e49f1f4ac27799, []int{11}
 }
 func (m *SpacePayload) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -862,7 +922,7 @@ func (m *SpaceHeader) Reset()         { *m = SpaceHeader{} }
 func (m *SpaceHeader) String() string { return proto.CompactTextString(m) }
 func (*SpaceHeader) ProtoMessage()    {}
 func (*SpaceHeader) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{11}
+	return fileDescriptor_80e49f1f4ac27799, []int{12}
 }
 func (m *SpaceHeader) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -951,7 +1011,7 @@ func (m *RawSpaceHeader) Reset()         { *m = RawSpaceHeader{} }
 func (m *RawSpaceHeader) String() string { return proto.CompactTextString(m) }
 func (*RawSpaceHeader) ProtoMessage()    {}
 func (*RawSpaceHeader) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{12}
+	return fileDescriptor_80e49f1f4ac27799, []int{13}
 }
 func (m *RawSpaceHeader) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1012,7 +1072,7 @@ func (m *RawSpaceHeaderWithId) Reset()         { *m = RawSpaceHeaderWithId{} }
 func (m *RawSpaceHeaderWithId) String() string { return proto.CompactTextString(m) }
 func (*RawSpaceHeaderWithId) ProtoMessage()    {}
 func (*RawSpaceHeaderWithId) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{13}
+	return fileDescriptor_80e49f1f4ac27799, []int{14}
 }
 func (m *RawSpaceHeaderWithId) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1076,7 +1136,7 @@ func (m *SpaceSettingsContent) Reset()         { *m = SpaceSettingsContent{} }
 func (m *SpaceSettingsContent) String() string { return proto.CompactTextString(m) }
 func (*SpaceSettingsContent) ProtoMessage()    {}
 func (*SpaceSettingsContent) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{14}
+	return fileDescriptor_80e49f1f4ac27799, []int{15}
 }
 func (m *SpaceSettingsContent) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1167,7 +1227,7 @@ func (m *ObjectDelete) Reset()         { *m = ObjectDelete{} }
 func (m *ObjectDelete) String() string { return proto.CompactTextString(m) }
 func (*ObjectDelete) ProtoMessage()    {}
 func (*ObjectDelete) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{15}
+	return fileDescriptor_80e49f1f4ac27799, []int{16}
 }
 func (m *ObjectDelete) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1220,7 +1280,7 @@ func (m *SpaceDelete) Reset()         { *m = SpaceDelete{} }
 func (m *SpaceDelete) String() string { return proto.CompactTextString(m) }
 func (*SpaceDelete) ProtoMessage()    {}
 func (*SpaceDelete) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{16}
+	return fileDescriptor_80e49f1f4ac27799, []int{17}
 }
 func (m *SpaceDelete) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1274,7 +1334,7 @@ func (m *SpaceSettingsSnapshot) Reset()         { *m = SpaceSettingsSnapshot{} }
 func (m *SpaceSettingsSnapshot) String() string { return proto.CompactTextString(m) }
 func (*SpaceSettingsSnapshot) ProtoMessage()    {}
 func (*SpaceSettingsSnapshot) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{17}
+	return fileDescriptor_80e49f1f4ac27799, []int{18}
 }
 func (m *SpaceSettingsSnapshot) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1335,7 +1395,7 @@ func (m *SettingsData) Reset()         { *m = SettingsData{} }
 func (m *SettingsData) String() string { return proto.CompactTextString(m) }
 func (*SettingsData) ProtoMessage()    {}
 func (*SettingsData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{18}
+	return fileDescriptor_80e49f1f4ac27799, []int{19}
 }
 func (m *SettingsData) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1395,7 +1455,7 @@ func (m *SpaceSubscription) Reset()         { *m = SpaceSubscription{} }
 func (m *SpaceSubscription) String() string { return proto.CompactTextString(m) }
 func (*SpaceSubscription) ProtoMessage()    {}
 func (*SpaceSubscription) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{19}
+	return fileDescriptor_80e49f1f4ac27799, []int{20}
 }
 func (m *SpaceSubscription) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1456,7 +1516,7 @@ func (m *AclAddRecordRequest) Reset()         { *m = AclAddRecordRequest{} }
 func (m *AclAddRecordRequest) String() string { return proto.CompactTextString(m) }
 func (*AclAddRecordRequest) ProtoMessage()    {}
 func (*AclAddRecordRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{20}
+	return fileDescriptor_80e49f1f4ac27799, []int{21}
 }
 func (m *AclAddRecordRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1517,7 +1577,7 @@ func (m *AclAddRecordResponse) Reset()         { *m = AclAddRecordResponse{} }
 func (m *AclAddRecordResponse) String() string { return proto.CompactTextString(m) }
 func (*AclAddRecordResponse) ProtoMessage()    {}
 func (*AclAddRecordResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{21}
+	return fileDescriptor_80e49f1f4ac27799, []int{22}
 }
 func (m *AclAddRecordResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1579,7 +1639,7 @@ func (m *AclGetRecordsRequest) Reset()         { *m = AclGetRecordsRequest{} }
 func (m *AclGetRecordsRequest) String() string { return proto.CompactTextString(m) }
 func (*AclGetRecordsRequest) ProtoMessage()    {}
 func (*AclGetRecordsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{22}
+	return fileDescriptor_80e49f1f4ac27799, []int{23}
 }
 func (m *AclGetRecordsRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1639,7 +1699,7 @@ func (m *AclGetRecordsResponse) Reset()         { *m = AclGetRecordsResponse{} }
 func (m *AclGetRecordsResponse) String() string { return proto.CompactTextString(m) }
 func (*AclGetRecordsResponse) ProtoMessage()    {}
 func (*AclGetRecordsResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_80e49f1f4ac27799, []int{23}
+	return fileDescriptor_80e49f1f4ac27799, []int{24}
 }
 func (m *AclGetRecordsResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1690,6 +1750,7 @@ func init() {
 	proto.RegisterType((*HeadSyncRange)(nil), "spacesync.HeadSyncRange")
 	proto.RegisterType((*HeadSyncResult)(nil), "spacesync.HeadSyncResult")
 	proto.RegisterType((*HeadSyncResultElement)(nil), "spacesync.HeadSyncResultElement")
+	proto.RegisterType((*EncodedHeadSyncResults)(nil), "spacesync.EncodedHeadSyncResults")
 	proto.RegisterType((*HeadSyncRequest)(nil), "spacesync.HeadSyncRequest")
 	proto.RegisterType((*HeadSyncResponse)(nil), "spacesync.HeadSyncResponse")
 	proto.RegisterType((*ObjectSyncMessage)(nil), "spacesync.ObjectSyncMessage")
@@ -1718,89 +1779,90 @@ func init() {
 }
 
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+	0x85, 0x67, 0xbe, 0x38, 0xef, 0x7b, 0xb4, 0x68, 0x23, 0x93, 0x66, 0x6e, 0xa0, 0x01, 0xd3, 0xa4,
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+	0x10, 0x7e, 0x78, 0xc6, 0x8f, 0x4b, 0x2d, 0xac, 0x94, 0x91, 0x0f, 0xe0, 0x6a, 0x15, 0x3f, 0xeb,
+	0xee, 0x1c, 0xa9, 0xf3, 0x9b, 0x01, 0xab, 0x85, 0x94, 0xe4, 0x5c, 0xf8, 0xaa, 0x41, 0x62, 0xa2,
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+	0x49, 0xd4, 0x16, 0x55, 0xdf, 0xe4, 0x36, 0x90, 0x42, 0x89, 0xd3, 0x6a, 0x2c, 0x2b, 0x8d, 0x0a,
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+	0x2c, 0x64, 0x62, 0x1c, 0xa3, 0x6e, 0x5b, 0xce, 0x70, 0xf6, 0xa0, 0x55, 0xd5, 0x7a, 0x75, 0x2e,
+	0xd9, 0x8b, 0x12, 0x6a, 0xce, 0xd0, 0x73, 0x6b, 0x66, 0x73, 0xfb, 0x93, 0x01, 0xad, 0x41, 0xb1,
+	0x0d, 0xbb, 0x51, 0x28, 0xe4, 0xce, 0xfe, 0x18, 0xac, 0xe4, 0xf0, 0xed, 0x61, 0x80, 0x02, 0x2b,
+	0x06, 0xf8, 0xa8, 0x20, 0x3e, 0xa8, 0xd1, 0x92, 0x3a, 0x79, 0xa0, 0xb3, 0xd3, 0xd6, 0xa6, 0xb2,
+	0xbe, 0x3a, 0x3d, 0xfe, 0x99, 0x71, 0x51, 0xf9, 0xe1, 0x0a, 0x2c, 0x3d, 0x67, 0xc1, 0x18, 0x9d,
+	0x2e, 0x58, 0x45, 0x27, 0x33, 0x87, 0xee, 0x9e, 0x9e, 0x13, 0x2d, 0xbe, 0x09, 0x6b, 0x9e, 0xfa,
+	0x8a, 0x8f, 0x11, 0xe3, 0x6c, 0x63, 0x95, 0x99, 0xce, 0x57, 0x70, 0xa5, 0x94, 0xf0, 0x20, 0x64,
+	0x23, 0x7e, 0x1e, 0x09, 0x79, 0x4c, 0x12, 0x4d, 0xaf, 0xef, 0x25, 0xfb, 0xb8, 0x41, 0x0b, 0x9c,
+	0x59, 0x78, 0xb3, 0x0a, 0xfe, 0x7b, 0x03, 0xac, 0x14, 0x7a, 0x8f, 0x09, 0x46, 0xee, 0xc3, 0x8a,
+	0x9b, 0xd4, 0x54, 0xef, 0xf8, 0x1b, 0xd3, 0x55, 0x98, 0x2a, 0x3d, 0x4d, 0xf5, 0xe5, 0x25, 0xcd,
+	0x75, 0x74, 0xba, 0x82, 0xbd, 0x79, 0xb6, 0x69, 0x16, 0x34, 0xb3, 0x70, 0xbe, 0xd1, 0x2b, 0x69,
+	0x30, 0x3e, 0xe1, 0x6e, 0xec, 0x8f, 0xe4, 0x38, 0xcb, 0xb3, 0xa4, 0x17, 0x78, 0x9a, 0x62, 0x46,
+	0x93, 0x07, 0xb0, 0xcc, 0x5c, 0xa9, 0xa5, 0xaf, 0x15, 0x67, 0xc6, 0x59, 0x01, 0x69, 0x47, 0x69,
+	0x52, 0x6d, 0xe1, 0xf4, 0x61, 0x7d, 0xc7, 0x0d, 0x76, 0x3c, 0x8f, 0xa2, 0x1b, 0xc5, 0xde, 0x3f,
+	0x5f, 0xb9, 0x85, 0x6b, 0xc0, 0x2c, 0x5d, 0x03, 0xce, 0xe7, 0xd0, 0x2a, 0x43, 0xe9, 0x6d, 0xda,
+	0x81, 0x7a, 0xac, 0x38, 0x19, 0x58, 0x46, 0x5f, 0x80, 0xf6, 0xa9, 0x42, 0xfb, 0x04, 0x45, 0x82,
+	0xc6, 0xdf, 0x2a, 0x32, 0xe6, 0x06, 0x07, 0xf9, 0x03, 0x25, 0x25, 0x9d, 0x2d, 0xb8, 0x32, 0x85,
+	0xa5, 0x43, 0x53, 0xb7, 0x9d, 0x62, 0xa9, 0xa2, 0x5a, 0x34, 0x25, 0x6f, 0xfd, 0x69, 0x40, 0x7d,
+	0x3f, 0x8e, 0x77, 0x23, 0x0f, 0x39, 0x69, 0x02, 0x3c, 0x0d, 0xf1, 0xe5, 0x08, 0x5d, 0x81, 0x9e,
+	0x5d, 0x23, 0xb6, 0xde, 0xf5, 0x87, 0x3e, 0xe7, 0x7e, 0x78, 0x66, 0x1b, 0xe4, 0x92, 0x9e, 0xe8,
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+	0xa8, 0xc2, 0x29, 0x3c, 0x1d, 0x28, 0xd8, 0xf9, 0x63, 0x6c, 0x20, 0x62, 0x64, 0x43, 0x72, 0x7d,
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+	0x77, 0x41, 0x23, 0xcf, 0x60, 0x23, 0x67, 0xea, 0x84, 0xde, 0x3d, 0xc8, 0xbb, 0x06, 0x39, 0x02,
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+	0x95, 0x8e, 0x2c, 0x99, 0xb2, 0x98, 0x59, 0x0c, 0x9d, 0xde, 0x7c, 0x85, 0x04, 0xf3, 0xe1, 0xfb,
+	0xbf, 0xbe, 0xee, 0x1a, 0xaf, 0x5e, 0x77, 0x8d, 0x3f, 0x5e, 0x77, 0x8d, 0x1f, 0xdf, 0x74, 0x6b,
+	0xaf, 0xde, 0x74, 0x6b, 0xbf, 0xbf, 0xe9, 0xd6, 0xbe, 0xec, 0xcc, 0xff, 0x07, 0xf1, 0x64, 0x59,
+	0xfd, 0xdc, 0xfb, 0x3b, 0x00, 0x00, 0xff, 0xff, 0x01, 0x10, 0xe3, 0xc4, 0x45, 0x0e, 0x00, 0x00,
 }
 
 func (m *HeadSyncRange) Marshal() (dAtA []byte, err error) {
@@ -1937,6 +1999,43 @@ func (m *HeadSyncResultElement) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	return len(dAtA) - i, nil
 }
 
+func (m *EncodedHeadSyncResults) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *EncodedHeadSyncResults) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *EncodedHeadSyncResults) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.Results) > 0 {
+		for iNdEx := len(m.Results) - 1; iNdEx >= 0; iNdEx-- {
+			{
+				size, err := m.Results[iNdEx].MarshalToSizedBuffer(dAtA[:i])
+				if err != nil {
+					return 0, err
+				}
+				i -= size
+				i = encodeVarintSpacesync(dAtA, i, uint64(size))
+			}
+			i--
+			dAtA[i] = 0xa
+		}
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *HeadSyncRequest) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
@@ -2006,6 +2105,13 @@ func (m *HeadSyncResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.EncodedResult) > 0 {
+		i -= len(m.EncodedResult)
+		copy(dAtA[i:], m.EncodedResult)
+		i = encodeVarintSpacesync(dAtA, i, uint64(len(m.EncodedResult)))
+		i--
+		dAtA[i] = 0x1a
+	}
 	if m.DiffType != 0 {
 		i = encodeVarintSpacesync(dAtA, i, uint64(m.DiffType))
 		i--
@@ -2887,6 +2993,21 @@ func (m *HeadSyncResultElement) Size() (n int) {
 	return n
 }
 
+func (m *EncodedHeadSyncResults) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if len(m.Results) > 0 {
+		for _, e := range m.Results {
+			l = e.Size()
+			n += 1 + l + sovSpacesync(uint64(l))
+		}
+	}
+	return n
+}
+
 func (m *HeadSyncRequest) Size() (n int) {
 	if m == nil {
 		return 0
@@ -2924,6 +3045,10 @@ func (m *HeadSyncResponse) Size() (n int) {
 	if m.DiffType != 0 {
 		n += 1 + sovSpacesync(uint64(m.DiffType))
 	}
+	l = len(m.EncodedResult)
+	if l > 0 {
+		n += 1 + l + sovSpacesync(uint64(l))
+	}
 	return n
 }
 
@@ -3670,6 +3795,90 @@ func (m *HeadSyncResultElement) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *EncodedHeadSyncResults) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowSpacesync
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: EncodedHeadSyncResults: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: EncodedHeadSyncResults: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Results", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSpacesync
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Results = append(m.Results, &HeadSyncResult{})
+			if err := m.Results[len(m.Results)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipSpacesync(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func (m *HeadSyncRequest) Unmarshal(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
@@ -3887,6 +4096,40 @@ func (m *HeadSyncResponse) Unmarshal(dAtA []byte) error {
 					break
 				}
 			}
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field EncodedResult", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSpacesync
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.EncodedResult = append(m.EncodedResult[:0], dAtA[iNdEx:postIndex]...)
+			if m.EncodedResult == nil {
+				m.EncodedResult = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipSpacesync(dAtA[iNdEx:])
diff --git a/go.mod b/go.mod
index 5df18009..728549af 100644
--- a/go.mod
+++ b/go.mod
@@ -18,6 +18,7 @@ require (
 	github.com/cheggaaa/mb/v3 v3.0.2
 	github.com/gobwas/glob v0.2.3
 	github.com/goccy/go-graphviz v0.2.9
+	github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db
 	github.com/google/uuid v1.6.0
 	github.com/hashicorp/yamux v0.1.2
 	github.com/huandu/skiplist v1.2.1
diff --git a/go.sum b/go.sum
index 17d68734..eb21d7cd 100644
--- a/go.sum
+++ b/go.sum
@@ -96,6 +96,8 @@ github.com/goccy/go-graphviz v0.2.9/go.mod h1:hssjl/qbvUXGmloY81BwXt2nqoApKo7DFg
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w=
+github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/gopacket v1.1.19 h1:ves8RnFZPGiFnTS0uPQStjwru6uO6h+nlr9j6fL7kF8=