The sun.reflect.noCaches option was put in place as a debugging aid when caching was added to core reflection[1], with the intent to remove it once overly inefficient uses of reflection was weeded out[2]. This appears to have been forgotten and should be cleaned up.

[1] https://bugs.openjdk.java.net/browse/JDK-4419062
[2] https://bugs.openjdk.java.net/browse/JDK-4430358