(#393) shortcut multiplication if any of the operands is zero

unitsofmeasurement · Oct 18, 2023 · c300a32 · c300a32
1 parent 1721d8d
commit c300a32
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/main/java/tech/units/indriya/function/DefaultNumberSystem.java b/src/main/java/tech/units/indriya/function/DefaultNumberSystem.java
@@ -775,6 +775,12 @@ private Number addWideAndNarrow(
     private Number multiplyWideAndNarrow(
             final NumberType wideType, final Number wide,
             final NumberType narrowType, final Number narrow) {
+
+        // shortcut if any of the operands is zero.
+        if (wideType.isZero(wide)
+                || narrowType.isZero(narrow)) {
+            return 0;
+        }
 
         if(wideType.isIntegerOnly()) {
             // at this point we know, that narrow must also be an integer-only type