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8264288: Performance issue with MethodHandle.asCollector

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Reviewed-by: jrose, vlivanov
This commit is contained in:
Jorn Vernee 2021-04-05 20:05:07 +00:00
parent 920189918e
commit b7baca7f32
10 changed files with 197 additions and 358 deletions
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10
src/java.base/share/classes/java/lang/invoke/MethodHandle.java
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@ -1244,13 +1244,9 @@ assertEquals("[123]", (String) longsToString.invokeExact((long)123));
asCollectorChecks(arrayType, collectArgPos, arrayLength);
BoundMethodHandle mh = rebind();
MethodType resultType = type().asCollectorType(arrayType, collectArgPos, arrayLength);
MethodHandle newArray = MethodHandleImpl.varargsArray(arrayType, arrayLength);
LambdaForm lform = mh.editor().collectArgumentArrayForm(1 + collectArgPos, newArray);
if (lform != null) {
return mh.copyWith(resultType, lform);
}
lform = mh.editor().collectArgumentsForm(1 + collectArgPos, newArray.type().basicType());
return mh.copyWithExtendL(resultType, lform, newArray);
MethodHandle collector = MethodHandleImpl.varargsArray(arrayType, arrayLength);
LambdaForm lform = mh.editor().collectArgumentsForm(1 + collectArgPos, collector.type().basicType());
return mh.copyWithExtendL(resultType, lform, collector);
}
/**