Static analysis of an unknown compression format
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Submission timeline
2007–2026One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.
First comments on top threads
HN comment orderThat's a fairly common compression technique on PS3 titles. Breaking the file into regularly sized chunks about 64kb (for lzma) permits decompression of the file in parallel on the SPUs as the dictionary and decompressed data can fit entirely in local store. Since optical drives have terrible seek times and low bandwidth most assets are stored compressed on disc.
This guy's a genuine detective. Love how he documented every small insight and what it led to.
The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.
- Breakout years
- 2
- Total points
- 335
- Total comments
- 13
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking
Every submission
| Date | Title as submitted | By | Points | Comments |
|---|---|---|---|---|
| 2012-04-07 | Static analysis of an unknown compression formatFirst breakout · Best thread | kalenz | 222 | 12 |
| 2015-03-15 | Static analysis of an unknown compression format (2012) | luu | 2 | 0 |
| 2019-10-31 | Static analysis of an unknown compression format (2012)Latest 20+ point return | luu | 111 | 1 |