src/java.base/share/native/libjava/jni_util.h

rev 17266 : 8181147: JNI_GetStringPlatformChars should have a fast path for UTF-8
Reviewed-by: TBD

@@ -380,11 +380,12 @@
 enum {
     NO_ENCODING_YET = 0,        /* "sun.jnu.encoding" not yet set */
     NO_FAST_ENCODING,           /* Platform encoding is not fast */
     FAST_8859_1,                /* ISO-8859-1 */
     FAST_CP1252,                /* MS-DOS Cp1252 */
-    FAST_646_US                 /* US-ASCII : ISO646-US */
+    FAST_646_US,                /* US-ASCII : ISO646-US */
+    FAST_UTF_8
 };
 
 int getFastEncoding();
 
 void initializeEncoding();