diff --git a/database/postgis/buffer.go b/database/postgis/buffer.go
index 0899418..c6668bc 100644
--- a/database/postgis/buffer.go
+++ b/database/postgis/buffer.go
@@ -10,18 +10,12 @@ type DeleteElement struct {
 }
 
 type InsertBuffer struct {
-	insertc chan InsertElement
-	deletec chan DeleteElement
-	done    chan bool
-	Tables  map[string]*TableTx
+	Tables map[string]*TableTx
 }
 
 func NewInsertBuffer(pg *PostGIS, bulkImport bool) *InsertBuffer {
 	ib := InsertBuffer{
-		insertc: make(chan InsertElement),
-		deletec: make(chan DeleteElement),
-		done:    make(chan bool),
-		Tables:  make(map[string]*TableTx),
+		Tables: make(map[string]*TableTx),
 	}
 	for tableName, table := range pg.Tables {
 		tt := pg.NewTableTx(table, bulkImport)
@@ -32,12 +26,10 @@ func NewInsertBuffer(pg *PostGIS, bulkImport bool) *InsertBuffer {
 		ib.Tables[tableName] = tt
 	}
 
-	go ib.loop()
 	return &ib
 }
 
 func (ib *InsertBuffer) End() error {
-	ib.Close()
 	for _, tt := range ib.Tables {
 		if err := tt.Commit(); err != nil {
 			return err
@@ -47,42 +39,24 @@ func (ib *InsertBuffer) End() error {
 }
 
 func (ib *InsertBuffer) Abort() error {
-	ib.Close()
 	for _, tt := range ib.Tables {
 		tt.Rollback()
 	}
 	return nil
 }
 
-func (ib *InsertBuffer) Close() {
-	ib.done <- true
-}
-
 func (ib *InsertBuffer) Insert(table string, row []interface{}) {
-	ib.insertc <- InsertElement{table, row}
+	tt, ok := ib.Tables[table]
+	if !ok {
+		panic("unknown table " + table)
+	}
+	tt.Insert(row)
 }
 
 func (ib *InsertBuffer) Delete(table string, id int64) {
-	ib.deletec <- DeleteElement{table, id}
-}
-
-func (ib *InsertBuffer) loop() {
-	for {
-		select {
-		case elem := <-ib.insertc:
-			tt, ok := ib.Tables[elem.Table]
-			if !ok {
-				panic("unknown table " + elem.Table)
-			}
-			tt.Insert(elem.Row)
-		case elem := <-ib.deletec:
-			tt, ok := ib.Tables[elem.Table]
-			if !ok {
-				panic("unknown table " + elem.Table)
-			}
-			tt.Delete(elem.Id)
-		case <-ib.done:
-			return
-		}
+	tt, ok := ib.Tables[table]
+	if !ok {
+		panic("unknown table " + table)
 	}
+	tt.Delete(id)
 }