Don't allocate a new object when constructing an empty Metrics

trinodb · Nov 25, 2021 · b47e6b8 · b47e6b8
1 parent 9a824be
commit b47e6b8
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/core/trino-spi/src/main/java/io/trino/spi/metrics/Metrics.java b/core/trino-spi/src/main/java/io/trino/spi/metrics/Metrics.java
@@ -75,6 +75,9 @@ private static Metric<?> merge(Metric<?> a, Metric<?> b)
 
         public Metrics get()
         {
+            if (merged.isEmpty()) {
+                return EMPTY;
+            }
             return new Metrics(merged);
         }
     }