pub fn encode_delta(base: &[u8], new: &[u8]) -> Vec<u8> ⓘExpand description
Single-span delta: the longest common prefix and suffix become COPYs,
the middle an INSERT. Covers appends, prepends, truncations, and one
contiguous in-place edit — the common shapes of saved files and logs.
Scattered edits degrade to a large INSERT; the caller falls back to
full content when the encoding is not clearly smaller.