diff --git a/common/background/progress.go b/common/background/progress.go
index df8743133..b9ae37dde 100644
--- a/common/background/progress.go
+++ b/common/background/progress.go
@@ -5,7 +5,7 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/google/btree"
+	btree2 "github.com/tidwall/btree"
 	"go.uber.org/atomic"
 )
 
@@ -24,13 +24,13 @@ func (p *Progress) percent() int {
 
 // ProgressSet - tracks multiple background job progress
 type ProgressSet struct {
-	b    *btree.BTreeG[*Progress]
+	list *btree2.Map[int, *Progress]
 	i    int
 	lock sync.RWMutex
 }
 
 func NewProgressSet() *ProgressSet {
-	return &ProgressSet{b: btree.NewG(4, func(i, j *Progress) bool { return i.i < j.i })}
+	return &ProgressSet{list: btree2.NewMap[int, *Progress](128)}
 }
 
 func (s *ProgressSet) Add(p *Progress) {
@@ -38,13 +38,13 @@ func (s *ProgressSet) Add(p *Progress) {
 	defer s.lock.Unlock()
 	s.i++
 	p.i = s.i
-	s.b.ReplaceOrInsert(p)
+	s.list.Set(p.i, p)
 }
 
 func (s *ProgressSet) Delete(p *Progress) {
 	s.lock.Lock()
 	defer s.lock.Unlock()
-	s.b.Delete(p)
+	s.list.Delete(p.i)
 }
 
 func (s *ProgressSet) String() string {
@@ -52,10 +52,10 @@ func (s *ProgressSet) String() string {
 	defer s.lock.RUnlock()
 	var sb strings.Builder
 	var i int
-	s.b.Ascend(func(p *Progress) bool {
+	s.list.Scan(func(_ int, p *Progress) bool {
 		sb.WriteString(fmt.Sprintf("%s=%d%%", p.Name.Load(), p.percent()))
 		i++
-		if i != s.b.Len() {
+		if i != s.list.Len() {
 			sb.WriteString(", ")
 		}
 		return true
diff --git a/go.mod b/go.mod
index 321c2b4c8..5aa660b31 100644
--- a/go.mod
+++ b/go.mod
@@ -24,6 +24,7 @@ require (
 	github.com/quasilyte/go-ruleguard/dsl v0.3.21
 	github.com/spaolacci/murmur3 v1.1.0
 	github.com/stretchr/testify v1.8.1
+	github.com/tidwall/btree v1.5.0
 	github.com/torquem-ch/mdbx-go v0.27.0
 	go.uber.org/atomic v1.10.0
 	golang.org/x/crypto v0.4.0
@@ -89,7 +90,6 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rs/dnscache v0.0.0-20211102005908-e0241e321417 // indirect
-	github.com/tidwall/btree v1.3.1 // indirect
 	github.com/valyala/fastrand v1.1.0 // indirect
 	github.com/valyala/histogram v1.2.0 // indirect
 	go.etcd.io/bbolt v1.3.6 // indirect
diff --git a/go.sum b/go.sum
index ecdbff5ce..29f77fc61 100644
--- a/go.sum
+++ b/go.sum
@@ -372,8 +372,8 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/tidwall/btree v1.3.1 h1:636+tdVDs8Hjcf35Di260W2xCW4KuoXOKyk9QWOvCpA=
-github.com/tidwall/btree v1.3.1/go.mod h1:LGm8L/DZjPLmeWGjv5kFrY8dL4uVhMmzmmLYmsObdKE=
+github.com/tidwall/btree v1.5.0 h1:iV0yVY/frd7r6qGBXfEYs7DH0gTDgrKTrDjS7xt/IyQ=
+github.com/tidwall/btree v1.5.0/go.mod h1:LGm8L/DZjPLmeWGjv5kFrY8dL4uVhMmzmmLYmsObdKE=
 github.com/tinylib/msgp v1.0.2/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
 github.com/tinylib/msgp v1.1.0/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
 github.com/tinylib/msgp v1.1.2/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
diff --git a/state/aggregator22.go b/state/aggregator22.go
index 63f104b29..141b269f2 100644
--- a/state/aggregator22.go
+++ b/state/aggregator22.go
@@ -23,13 +23,13 @@ import (
 	math2 "math"
 	"runtime"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/RoaringBitmap/roaring/roaring64"
 	"github.com/ledgerwatch/erigon-lib/common/dbg"
 	"github.com/ledgerwatch/log/v3"
 	"go.uber.org/atomic"
+	"golang.org/x/sync/errgroup"
 	"golang.org/x/sync/semaphore"
 
 	common2 "github.com/ledgerwatch/erigon-lib/common"
@@ -146,68 +146,29 @@ func (a *Aggregator22) closeFiles() {
 }
 
 func (a *Aggregator22) BuildMissedIndices(ctx context.Context, sem *semaphore.Weighted) error {
-	wg := sync.WaitGroup{}
-	errs := make(chan error, 7)
+	g, ctx := errgroup.WithContext(ctx)
 	if a.accounts != nil {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errs <- a.accounts.BuildMissedIndices(ctx, sem)
-		}()
+		g.Go(func() error { return a.accounts.BuildMissedIndices(ctx, sem) })
 	}
 	if a.storage != nil {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errs <- a.storage.BuildMissedIndices(ctx, sem)
-		}()
+		g.Go(func() error { return a.storage.BuildMissedIndices(ctx, sem) })
 	}
 	if a.code != nil {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errs <- a.code.BuildMissedIndices(ctx, sem)
-		}()
+		g.Go(func() error { return a.code.BuildMissedIndices(ctx, sem) })
 	}
 	if a.logAddrs != nil {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errs <- a.logAddrs.BuildMissedIndices(ctx, sem)
-		}()
+		g.Go(func() error { return a.logAddrs.BuildMissedIndices(ctx, sem) })
 	}
 	if a.logTopics != nil {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errs <- a.logTopics.BuildMissedIndices(ctx, sem)
-		}()
+		g.Go(func() error { return a.logTopics.BuildMissedIndices(ctx, sem) })
 	}
 	if a.tracesFrom != nil {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errs <- a.tracesFrom.BuildMissedIndices(ctx, sem)
-		}()
+		g.Go(func() error { return a.tracesFrom.BuildMissedIndices(ctx, sem) })
 	}
 	if a.tracesTo != nil {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errs <- a.tracesTo.BuildMissedIndices(ctx, sem)
-		}()
+		g.Go(func() error { return a.tracesTo.BuildMissedIndices(ctx, sem) })
 	}
-	go func() {
-		wg.Wait()
-		close(errs)
-	}()
-	var lastError error
-	for err := range errs {
-		if err != nil {
-			lastError = err
-		}
-	}
-	return lastError
+	return g.Wait()
 }
 
 func (a *Aggregator22) SetLogPrefix(v string) { a.logPrefix = v }
diff --git a/state/history.go b/state/history.go
index 2c7092575..2368a5b36 100644
--- a/state/history.go
+++ b/state/history.go
@@ -36,6 +36,7 @@ import (
 	"github.com/ledgerwatch/erigon-lib/common/dbg"
 	"github.com/ledgerwatch/log/v3"
 	"golang.org/x/exp/slices"
+	"golang.org/x/sync/errgroup"
 	"golang.org/x/sync/semaphore"
 
 	"github.com/ledgerwatch/erigon-lib/etl"
@@ -261,23 +262,19 @@ func (h *History) BuildMissedIndices(ctx context.Context, sem *semaphore.Weighte
 	}
 
 	missedFiles := h.missedIdxFiles()
-	errs := make(chan error, len(missedFiles))
-	wg := sync.WaitGroup{}
-
+	g, ctx := errgroup.WithContext(ctx)
 	for _, item := range missedFiles {
-		if err := sem.Acquire(ctx, 1); err != nil {
-			errs <- err
-			break
-		}
-		wg.Add(1)
-		go func(item *filesItem) {
+		item := item
+		g.Go(func() error {
+			if err := sem.Acquire(ctx, 1); err != nil {
+				return err
+			}
 			defer sem.Release(1)
-			defer wg.Done()
 
 			search := &filesItem{startTxNum: item.startTxNum, endTxNum: item.endTxNum}
 			iiItem, ok := h.InvertedIndex.files.Get(search)
 			if !ok {
-				return
+				return nil
 			}
 
 			fromStep, toStep := item.startTxNum/h.aggregationStep, item.endTxNum/h.aggregationStep
@@ -286,23 +283,13 @@ func (h *History) BuildMissedIndices(ctx context.Context, sem *semaphore.Weighte
 			log.Info("[snapshots] build idx", "file", fName)
 			count, err := iterateForVi(item, iiItem, h.compressVals, func(v []byte) error { return nil })
 			if err != nil {
-				errs <- err
+				return err
 			}
-			errs <- buildVi(item, iiItem, idxPath, h.tmpdir, count, false /* values */, h.compressVals)
-		}(item)
+			return buildVi(item, iiItem, idxPath, h.tmpdir, count, false /* values */, h.compressVals)
+		})
 	}
-	go func() {
-		wg.Wait()
-		close(errs)
-	}()
-	var lastError error
-	for err := range errs {
-		if err != nil {
-			lastError = err
-		}
-	}
-	if lastError != nil {
-		return lastError
+	if err := g.Wait(); err != nil {
+		return err
 	}
 
 	return h.openFiles()
diff --git a/state/inverted_index.go b/state/inverted_index.go
index e4d83811d..f3cf1c8e6 100644
--- a/state/inverted_index.go
+++ b/state/inverted_index.go
@@ -38,6 +38,7 @@ import (
 	"github.com/ledgerwatch/erigon-lib/common/dbg"
 	"github.com/ledgerwatch/log/v3"
 	"golang.org/x/exp/slices"
+	"golang.org/x/sync/errgroup"
 	"golang.org/x/sync/semaphore"
 
 	"github.com/ledgerwatch/erigon-lib/common/cmp"
@@ -184,39 +185,27 @@ func (ii *InvertedIndex) missedIdxFiles() (l []*filesItem) {
 // BuildMissedIndices - produce .efi/.vi/.kvi from .ef/.v/.kv
 func (ii *InvertedIndex) BuildMissedIndices(ctx context.Context, sem *semaphore.Weighted) (err error) {
 	missedFiles := ii.missedIdxFiles()
-	errs := make(chan error, len(missedFiles))
-	wg := sync.WaitGroup{}
+	g, ctx := errgroup.WithContext(ctx)
 	for _, item := range missedFiles {
-		if err := sem.Acquire(ctx, 1); err != nil {
-			errs <- err
-			break
-		}
-		wg.Add(1)
-		go func(item *filesItem) {
+		item := item
+		g.Go(func() error {
+			if err := sem.Acquire(ctx, 1); err != nil {
+				return err
+			}
 			defer sem.Release(1)
-			defer wg.Done()
 			fromStep, toStep := item.startTxNum/ii.aggregationStep, item.endTxNum/ii.aggregationStep
 			fName := fmt.Sprintf("%s.%d-%d.efi", ii.filenameBase, fromStep, toStep)
 			idxPath := filepath.Join(ii.dir, fName)
 			log.Info("[snapshots] build idx", "file", fName)
 			_, err := buildIndex(ctx, item.decompressor, idxPath, ii.tmpdir, item.decompressor.Count()/2, false)
 			if err != nil {
-				errs <- err
+				return err
 			}
-		}(item)
+			return nil
+		})
 	}
-	go func() {
-		wg.Wait()
-		close(errs)
-	}()
-	var lastError error
-	for err := range errs {
-		if err != nil {
-			lastError = err
-		}
-	}
-	if lastError != nil {
-		return lastError
+	if err := g.Wait(); err != nil {
+		return err
 	}
 	return ii.openFiles()
 }