goleveldb: bound iterator range for improved performance (#134)

tendermint · Nov 10, 2020 · 52e57bf · 52e57bf
1 parent 8ca6b8e
commit 52e57bf
Show file tree

Hide file tree

Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- [\#134](https://github.com/tendermint/tm-db/pull/134) Improve GoLevelDB iterator performance by bounding underlying iterator range (@klim0v)
+
 ## 0.5.1
 
 **2020-03-30**

diff --git a/goleveldb.go b/goleveldb.go
@@ -7,6 +7,7 @@ import (
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/errors"
 	"github.com/syndtr/goleveldb/leveldb/opt"
+	"github.com/syndtr/goleveldb/leveldb/util"
 )
 
 func init() {
@@ -158,12 +159,12 @@ func (db *GoLevelDB) NewBatch() Batch {
 
 // Iterator implements DB.
 func (db *GoLevelDB) Iterator(start, end []byte) (Iterator, error) {
-	itr := db.db.NewIterator(nil, nil)
+	itr := db.db.NewIterator(&util.Range{Start: start, Limit: end}, nil)
 	return newGoLevelDBIterator(itr, start, end, false), nil
 }
 
 // ReverseIterator implements DB.
 func (db *GoLevelDB) ReverseIterator(start, end []byte) (Iterator, error) {
-	itr := db.db.NewIterator(nil, nil)
+	itr := db.db.NewIterator(&util.Range{Start: start, Limit: end}, nil)
 	return newGoLevelDBIterator(itr, start, end, true), nil
 }