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8199862: Examine ProxyBuilder::referencedTypes startup cost

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Reviewed-by: mchung
This commit is contained in:
Claes Redestad 2018-03-21 10:13:49 +01:00
parent 74827c6a87
commit c71bc3581a
4 changed files with 38 additions and 16 deletions
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40
src/java.base/share/classes/java/lang/reflect/Proxy.java
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@ -708,24 +708,32 @@ public class Proxy implements java.io.Serializable {
*/
private static Set<Class<?>> referencedTypes(ClassLoader loader,
List<Class<?>> interfaces) {
return interfaces.stream()
.flatMap(intf -> Stream.of(intf.getMethods())
.filter(m -> !Modifier.isStatic(m.getModifiers()))
.flatMap(ProxyBuilder::methodRefTypes)
.map(ProxyBuilder::getElementType)
.filter(t -> !t.isPrimitive()))
.collect(Collectors.toSet());
var types = new HashSet<Class<?>>();
for (var intf : interfaces) {
for (Method m : intf.getMethods()) {
if (!Modifier.isStatic(m.getModifiers())) {
addElementType(types, m.getReturnType());
addElementTypes(types, m.getSharedParameterTypes());
addElementTypes(types, m.getSharedExceptionTypes());
}
}
}
return types;
}
/*
* Extracts all types referenced on a method signature including
* its return type, parameter types, and exception types.
*/
private static Stream<Class<?>> methodRefTypes(Method m) {
return Stream.of(new Class<?>[] { m.getReturnType() },
m.getParameterTypes(),
m.getExceptionTypes())
.flatMap(Stream::of);
private static void addElementTypes(HashSet<Class<?>> types,
Class<?> ... classes) {
for (var cls : classes) {
addElementType(types, cls);
}
}
private static void addElementType(HashSet<Class<?>> types,
Class<?> cls) {
var type = getElementType(cls);
if (!type.isPrimitive()) {
types.add(type);
}
}
/**