Make MapTile a struct

[kazimuth]

Seeing as hundreds of millions of them are allocated, it's probably a good idea to allocate them all at once. (It will use marginally more memory, but still only like a megabyte, and put less stress on the GC.)

[RosaryMala]

Allocating new ones isn't that costly though.

On Sun 10 May, 2015 12:56 pm James Gilles notifications@github.com wrote:

Seeing as hundreds of millions of them are allocated, it's probably a good
idea to allocate them all at once. (It will use marginally more memory, but
still only like a megabyte, and put less stress on the GC.)

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#11.

[kazimuth]

Done in be67d7d.