danielsun1106 commented on a change in pull request #1561:
URL: https://github.com/apache/groovy/pull/1561#discussion_r613659839
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File path: src/main/java/org/codehaus/groovy/classgen/asm/OperandStack.java
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@@ -331,19 +332,13 @@ private void doConvertAndCast(ClassNode targetType, final
boolean coerce) {
ClassNode top = stack.get(size - 1);
targetType = targetType.redirect();
- if (targetType == top) return;
+ if (ClassNodeUtils.isCompatibleWith(top, targetType)) return;
if (coerce) {
controller.getInvocationWriter().coerce(top, targetType);
return;
}
- // GROOVY-10034: no need to cast non-primitive array when target is
"java.lang.Object[]"
- if (targetType.isArray() &&
targetType.getComponentType().equals(ClassHelper.OBJECT_TYPE)
- && top.isArray() &&
!ClassHelper.isPrimitiveType(top.getComponentType())) {
- return;
- }
Review comment:
> I thought the goal was to simplify from GROOVY-10034. Now we have
multiple new public APIs to support? Object[] can accept any kind of array
regardless of dimension, except one-dimensional primitive array. This was
accounted for in the original condition.
Actually the goal is to tweak the fix for GROOVY-10034, not only simplify
the check but also make it general to eliminate more redundant type cast.
( See https://github.com/apache/groovy/pull/1556#discussion_r611815705 )
> targetType == top is a much faster comparison then always making a method
call. == or .equals should probably be kept before making a method call.
OK. Let's add the check `targetType == top` before `isCompatibleWith` method
call for better performance.
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