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8338937: Optimize the string concatenation of ClassDesc

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Reviewed-by: liach
This commit is contained in:
Shaojin Wen 2024-09-04 22:45:17 +00:00 • committed by Chen Liang
parent d4dfa0127f
commit 55312e1549
7 changed files with 53 additions and 18 deletions
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16
src/java.base/share/classes/java/lang/StringConcatHelper.java
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@ -783,4 +783,20 @@ final class StringConcatHelper {
}
throw new OutOfMemoryError("Overflow: String length out of range");
}
@ForceInline
private static String concat0(String prefix, String str, String suffix) {
byte coder = (byte) (prefix.coder() | str.coder() | suffix.coder());
int len = prefix.length() + str.length();
byte[] buf = newArrayWithSuffix(suffix, len, coder);
prepend(len, coder, buf, str, prefix);
return new String(buf, coder);
}
@ForceInline
static String concat(String prefix, Object value, String suffix) {
if (prefix == null) prefix = "null";
if (suffix == null) suffix = "null";
return concat0(prefix, stringOf(value), suffix);
}
}