DENSITY is a superfast compression library

For more information about DENSITY, see https://github.com/centaurean/density

Codecs

• density — DENSITY data.

Options

Includes excerpts from the DENSITY README.

• level (integer, 1 or 9, default 1)
  • 1 — Chameleon algorithm: "This is a dictionary lookup based compression algorithm. It is designed for absolute speed and usually reaches a ~60% compression ratio on compressible data. Decompression is just as fast. This algorithm is a great choice when main concern is speed." - 7 — Cheetah algorithm: "This algorithm was developed in conjunction with Piotr Tarsa. It uses swapped double dictionary lookups and predictions. It can be extremely good with highly compressible data (ratio reaching ~5% or less). On typical compressible data compression ratio is ~50% or less. It is still extremely fast for both compression and decompression and is a great, efficient all-rounder algorithm."

  • 9 — Lion algorithm: "Lion is a multiform compression algorithm, just like a variable geometry aircraft it adapts to the incoming data and tries to offer the most efficient compression technique available.

    It uses swapped double dictionary lookups, multiple predictions, shifting sub-word dictionary lookups, symbol and forms rank entropy coding.

    Lion provides the best compression ratio of all three algorithms under any circumstance, and is still very fast."

• checksum (boolean, default false) — whether or not to include a checksum (SpookyHash) for integrity checks during decompression.

License

The density plugin is licensed under the MIT License, and DENSITY is licensed under a 3-clause BSD license.