Chunk block iter

[ToBinio]

I tried creating a chunk-block-iter and honestly struggelt...
but i finaly got a pretty stupid version running for the CurrentJavaChunk... but the performance is questionable.

just a small warning this code is a mess. Dont worry it well get better.

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iter-chunk-blocks.rs is a small exmaple (currently test) file. It containes 3 simple loops and messures very simple the performance. times on my machine with --release

• iter var1 - 12 ms
• iter var2 - 13 ms
• loop by hand - 1 ms

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chunk_block_iter.rs contains 2 Iterators

• the first tries to be more performent with the help of try_iter_indices()
  • theoretically could be performance wise improved (i think)
• the second is very simple and just uses block(x, y, z)
  • would work with all chunk types

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i dont know if i am using rusts Iterator Trait wrong but it feels like the performance overhead is to big.

maby i am also missing some major point to improve iter var1.

[owengage]

I've not looked closely, but your performance difference may be down to the raw loops only taking a reference to the block in the palette, whereas the iterator clones the block, which will involve cloning a string.

[ToBinio]

Oh. Wow i did not expected that to make such a big difference...
new times:

• iter var1 - 0.5 ms
• iter var2 - 1 ms
• loop by hand - 1 ms

[ToBinio]

change of plans #79