pulsar 2.5.0
Public GPLv3 lossless compressor from Slid Phi Labs. Table name is pulsar.
This is the OSCB line emailed to Matt Mahoney on 2026-09-02.
Silesia (12 files, individually)
55,745,438 bytes of 211,938,580 (0.2630). DECODE_OK 12/12.
- Beats gzip-9 12/12 (gzip-9 = 67,631,990)
- Loses to bzip2-9 (+1.24M; bzip2-9 = 54,506,769)
- Loses to xz-6 (~+6.3M; xz-6 ~49.4M)
Not a rank claim against paq8px, cmix, or zpaq.
What this is not
- Not Combined GC
- Not AWARE
- Not a hosted production encoder
License
GPL-3.0-or-later from 2.4.0. See LICENSE and LICENSE-CHANGE.md. Commercial embedding: COMMERCIAL.md.
Build
cargo test --lib
cargo run --release --bin pulsar -- encode IN -o OUT
cargo run --release --bin pulsar -- decode OUT -o BACK
Linux x86_64 binary attached: pulsar-2.5.0-x86_64-linux.