add unused pointslices to the pool (#4363)

Signed-off-by: Tony Lee <tl@hudson-trading.com>
6 years ago · bcdaf8e2d2
1 changed files with 2 additions and 0 deletions
--- a/promql/engine.go
+++ b/promql/engine.go
@ -1060,6 +1060,8 @@ func (ev *evaluator) matrixSelector(node *MatrixSelector) Matrix {

 		if len(ss.Points) > 0 {
 			matrix = append(matrix, ss)
+		} else {
+			putPointSlice(ss.Points)
 		}
 	}
 	return matrix