tsdb: re-use iterator when stepping through chunks
Saves memory allocations, hence reduces garbage-collection overheads.
@@ -682,7 +682,7 @@ func (p *populateWithDelSeriesIterator) Next() chunkenc.ValueType {
if p.currDelIter != nil {
p.curr = p.currDelIter
} else {
- p.curr = p.currChkMeta.Chunk.Iterator(nil)
+ p.curr = p.currChkMeta.Chunk.Iterator(p.curr)
}
if valueType := p.curr.Next(); valueType != chunkenc.ValNone {
return valueType
