Blog · 2026-09-09

PCC measured. pulsar matched OSCB. xz is still ahead.

Official Silesia 12. Whole files. md5-matched to Mahoney’s table. Raw 211,938,580 bytes. DECODE_OK on every keep, or it does not count. gzip, bzip2, and xz are opponents, not occupants.

PCC wrote 51,498,645. 12/12 restored.

pulsar 2.5.0 wrote 55,745,438. That matches OSCB. 12/12 restored.

gzip-9 on the same corpus is 67,631,990. bzip2-9 is 54,506,769. xz-6 is still smaller than PCC — about 49.4M. We do not claim #1.

An old AWARE+XZ1 line at 47.7M is retired. It occupied host xz. It is not a product spec, and it is not on this board.

champ, best, and PCC stay blank until they are 12/12. Dual-licensed: open terms, or a paid grant. Live board: https://www.slidphilabs.com/silesia.

55745438   2834 18110  2596  1764  2950  2844  1331  4699  5150  8678  4307   478  pulsar
51498645   2738 15970  2537  1582  2670  2761  1217  4156  4992  8169  4260   443  pcc

Silesia board pulsar .pcc