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8331114: Further improve performance of MethodTypeDesc::descriptorString

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Reviewed-by: mchung, liach
This commit is contained in:
Claes Redestad 2024-04-27 12:12:51 +00:00
parent e3eb652c25
commit a078b5e611
5 changed files with 33 additions and 15 deletions
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2
src/java.base/share/classes/java/lang/constant/ClassDesc.java
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@ -160,7 +160,7 @@ public sealed interface ClassDesc
static ClassDesc ofDescriptor(String descriptor) {
// implicit null-check
return (descriptor.length() == 1)
? Wrapper.forPrimitiveType(descriptor.charAt(0)).primitiveClassDescriptor()
? Wrapper.forPrimitiveType(descriptor.charAt(0)).classDescriptor()
// will throw IAE on descriptor.length == 0 or if array dimensions too long
: new ReferenceClassDescImpl(descriptor);
}

2
src/java.base/share/classes/java/lang/constant/ConstantUtils.java
View file

@ -226,7 +226,7 @@ class ConstantUtils {
private static ClassDesc resolveClassDesc(String descriptor, int start, int len) {
if (len == 1) {
return Wrapper.forBasicType(descriptor.charAt(start)).primitiveClassDescriptor();
return Wrapper.forPrimitiveType(descriptor.charAt(start)).classDescriptor();
}
return ClassDesc.ofDescriptor(descriptor.substring(start, start + len));
}

15
src/java.base/share/classes/java/lang/constant/MethodTypeDescImpl.java
View file

@ -33,7 +33,6 @@ import java.security.PrivilegedAction;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.util.StringJoiner;
import static java.util.Objects.requireNonNull;
@ -168,11 +167,17 @@ final class MethodTypeDescImpl implements MethodTypeDesc {
if (desc != null)
return desc;
var sj = new StringJoiner("", "(", ")" + returnType().descriptorString());
for (int i = 0; i < parameterCount(); i++) {
sj.add(parameterType(i).descriptorString());
int len = 2 + returnType.descriptorString().length();
for (ClassDesc argType : argTypes) {
len += argType.descriptorString().length();
}
return cachedDescriptorString = sj.toString();
StringBuilder sb = new StringBuilder(len).append('(');
for (ClassDesc argType : argTypes) {
sb.append(argType.descriptorString());
}
desc = sb.append(')').append(returnType.descriptorString()).toString();
cachedDescriptorString = desc;
return desc;
}
@Override