What?
Game uses zlib compression for BSAs, NPC and Landscape records. While you can decompress those, most mod authors don't.
Why is that an issue? Zlib is super slow to decompress, which leads to longer loading times and stuttering.
On top of that, game obviously uses a super old zlib version (1.2.1), which doesn't help.
I was bored, and decided to upgrade it to the latest version (1.3.1 at the time of writing), and to my surprise, it's about 2 times faster.
Does that mean that you should compress all BSAs now? No, the decompression time is still super slow.
Does that mean that you *can* compress BSAs without being scared of freezing the game every time a cell is loaded? Yea.
Port from New Vegas
Source Code
Credits
Jean-loup Gailly and Mark Adler for creating zlib
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