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8332249: Micro-optimize Method.hashCode

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Reviewed-by: liach
This commit is contained in:
Sean Gwizdak 2024-07-12 21:49:51 +00:00 • committed by Chen Liang
parent 4957145e6c
commit 8ba9bc6f17
2 changed files with 20 additions and 3 deletions
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10
src/java.base/share/classes/java/lang/reflect/Method.java
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@ -95,6 +95,8 @@ public final class Method extends Executable {
// If this branching structure would ever contain cycles, deadlocks can
// occur in annotation code.
private Method root;
// Hash code of this object
private int hash;
// Generics infrastructure
private String getGenericSignature() {return signature;}
@ -381,7 +383,13 @@ public final class Method extends Executable {
* method's declaring class name and the method's name.
*/
public int hashCode() {
return getDeclaringClass().getName().hashCode() ^ getName().hashCode();
int hc = hash;
if (hc == 0) {
hc = hash = getDeclaringClass().getName().hashCode() ^ getName()
.hashCode();
}
return hc;
}
/**