diff --git a/index/store/cznicb/cznicb.go b/index/store/cznicb/cznicb.go
index 9dce8e2d..479cde92 100644
--- a/index/store/cznicb/cznicb.go
+++ b/index/store/cznicb/cznicb.go
@@ -114,7 +114,7 @@ func (s *Store) Delete(k []byte) (err error) {
 func (s *Store) NewBatch() store.KVBatch {
 	return &Batch{
 		s:   s,
-		ops: make([]op, 0, 100),
+		ops: make([]op, 0, 1000),
 		ms:  map[string]store.AssociativeMergeChain{},
 	}
 }
diff --git a/index/store/leveldb/batch.go b/index/store/leveldb/batch.go
index ad815226..53bfe305 100644
--- a/index/store/leveldb/batch.go
+++ b/index/store/leveldb/batch.go
@@ -31,7 +31,7 @@ type Batch struct {
 func newBatch(store *Store) *Batch {
 	rv := Batch{
 		store:  store,
-		ops:    make([]op, 0, 100),
+		ops:    make([]op, 0, 1000),
 		merges: make(map[string]indexStore.AssociativeMergeChain),
 	}
 	return &rv
@@ -40,7 +40,7 @@ func newBatch(store *Store) *Batch {
 func newBatchAlreadyLocked(store *Store) *Batch {
 	rv := Batch{
 		store:         store,
-		ops:           make([]op, 0, 100),
+		ops:           make([]op, 0, 1000),
 		alreadyLocked: true,
 		merges:        make(map[string]indexStore.AssociativeMergeChain),
 	}
diff --git a/index/upside_down/benchmark_cznicb_test.go b/index/upside_down/benchmark_cznicb_test.go
index e4898df3..b56c87d2 100644
--- a/index/upside_down/benchmark_cznicb_test.go
+++ b/index/upside_down/benchmark_cznicb_test.go
@@ -106,3 +106,33 @@ func BenchmarkCznicBIndexing4Workers100Batch(b *testing.B) {
 
 	CommonBenchmarkIndexBatch(b, s, 4, 100)
 }
+
+func BenchmarkCznicBIndexing1Workers1000Batch(b *testing.B) {
+	s, err := cznicb.StoreConstructor(nil)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer s.Close()
+
+	CommonBenchmarkIndexBatch(b, s, 1, 1000)
+}
+
+func BenchmarkCznicBIndexing2Workers1000Batch(b *testing.B) {
+	s, err := cznicb.StoreConstructor(nil)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer s.Close()
+
+	CommonBenchmarkIndexBatch(b, s, 2, 1000)
+}
+
+func BenchmarkCznicBIndexing4Workers1000Batch(b *testing.B) {
+	s, err := cznicb.StoreConstructor(nil)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer s.Close()
+
+	CommonBenchmarkIndexBatch(b, s, 4, 1000)
+}
diff --git a/index/upside_down/benchmark_leveldb_test.go b/index/upside_down/benchmark_leveldb_test.go
index 6b38ad4c..e3a640d9 100644
--- a/index/upside_down/benchmark_leveldb_test.go
+++ b/index/upside_down/benchmark_leveldb_test.go
@@ -122,3 +122,36 @@ func BenchmarkLevelDBIndexing4Workers100Batch(b *testing.B) {
 
 	CommonBenchmarkIndexBatch(b, s, 4, 100)
 }
+
+func BenchmarkLevelDBIndexing1Workers1000Batch(b *testing.B) {
+	s, err := leveldb.Open("test", leveldbTestOptions)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer os.RemoveAll("test")
+	defer s.Close()
+
+	CommonBenchmarkIndexBatch(b, s, 1, 1000)
+}
+
+func BenchmarkLevelDBIndexing2Workers1000Batch(b *testing.B) {
+	s, err := leveldb.Open("test", leveldbTestOptions)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer os.RemoveAll("test")
+	defer s.Close()
+
+	CommonBenchmarkIndexBatch(b, s, 2, 1000)
+}
+
+func BenchmarkLevelDBIndexing4Workers1000Batch(b *testing.B) {
+	s, err := leveldb.Open("test", leveldbTestOptions)
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer os.RemoveAll("test")
+	defer s.Close()
+
+	CommonBenchmarkIndexBatch(b, s, 4, 1000)
+}