Patch: improve core:/ resource searches

[Tom Tromey]

>>>>> "Anthony" == Anthony Green <green@redhat.com> writes:

Anthony> This patch sets out to avoid these exceptions and still
Anthony> provide the same functionality.

Anthony> Ok for HEAD?

Ok.

Did this result in a noticeable speedup in your test case?  Just
curious ... it doesn't affect the patch since IMO it is an improvement
regardless.

I guess we can add a smarter data structure in _Jv_FindCore if this is
still a problem area.

Tom