Array Cow
=========

Introduction
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In memory array de-duplication, useful for efficiently storing many versions of data.

This is suitable for storing undo history for example, and is effective with both binary and text data.

- Configurable block sizes.
- Supports array-stride to avoids overhead of detecting blocks and un-aliened offsets.
  *(a stride of 1 for bytes works too)*
- Uses block hashing for de-duplication.
- Each state must only reference its previous, making both linear and tree structures possible.


Further Work
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It may be worth using ``mmap`` for data storage.