On Jul 18, 2014, at 4:02 AM, Vladimir Ivanov <vladimir.x.iva...@oracle.com> wrote: >> ValueConversions >> >> I can see why an EnumMap is used for convenience mapping the Wrapper to MH. >> IIUC it means the MH ref values are not @Stable? I guess it would be easy to >> unpack into an explicit array and index from the wrapper ordinal, plus then >> no additional runtime type checks on the key will be performed for get/put. >> Dunno how important that is. >> >> Can UNBOX_CONVERSIONS be marked as @Stable? does that make any difference? >> Same for BOX_CONVERSIONS etc. > All 4 caches in ValueConversions can be marked as @Stable. But it's not > performance critical, because they are used only during MethodHandle > instantiation, which is expected to be expensive. Performance-wise it make > sense to reuse MethodHandles. >
Ok. Paul.
