Jeremy Hunt
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Updated the version
Updated the version.
Yes, this applies to both the Anvil file format and the Region format as far as I can tell. There were very few changes between these two formats, and the decompiled code in 1.6 showed that it had not been fixed.
Oops, it looks like it has. I wrote this post a couple months ago when Attlasian's new account system was still down and just now was able to post it. The link is not super important, just some benchmarks. Here is a another (less official/scientific) link with similar information. http://stackoverflow.com/questions/2593531/traditional-io-vs-memory-mapped
Grum, I'm a little confused as to what you want... Minecraft is still closed-source, so I can't really provide faster modified code. I've given a description to the best of my ability of how the problem should most likely be addressed and linked to a page that contains example code for using FileChannels with MappedByteBuffers as well as benchmarks showing that it is indeed much faster. Without accesses to Mincraft's source-code, compilation environment/settings, and benchmarking tools, I can't really do much else.