Re: Help optimizing UnCompress for gzipped files

[Adam D. Ruppe via Digitalmars-d-learn]

On Tuesday, 2 January 2018 at 10:27:11 UTC, Christian Köstlin 
wrote:
After this I analyzed the first step of the process (gunzipping 
the data from a file to memory), and found out, that dlangs 
UnCompress is much slower than java, and ruby and plain c.

Yeah, std.zlib is VERY poorly written. You can get much better 
performance by just calling the C functions yourself instead. 
(You can just import import etc.c.zlib; it is included still)

Improving it would mean changing the public API. I think the 
one-shot compress/uncompress functions are ok, but the streaming 
class does a lot of unnecessary work inside like copying stuff 
around.