I remember reading about this a few years ago here. If I remember correctly back then the main selling point was that it used succinct data structure and it was only the compression algo that was not open source - everything else was.

But now when I look at the new repo and the online doc there is no mention of succinct data struct anywhere.

Also, the benchmarks back then claimed 10x or more faster than RocksDB. Now the performance claim is much more modest.

Does that mean TerarkDB no longer uses succinct data struct? Or are you just open sourcing a lower-end version of the software without the secret sauce?

Can you talk about what makes TerarkDB faster than RocksDB?