Function e_diff 

pub fn e_diff(li: impl AsRef<[u64]>) -> Vec<u8> 

Available on crate feature diff only.

Encodes a strictly increasing sequence of u64 integers using differential encoding (delta encoding) combined with variable-byte encoding. This reduces the serialized size by storing the differences between consecutive values.

使用差分编码（增量编码）结合变长编码对严格递增的 u64 整数序列进行编码。 通过存储连续值之间的差值来减少序列化后的大小，具有压缩效果。