Linus Torvalds wrote:
Now, it's possible that I'm just wrong, but the instruction-level profile really did pinpoint the "look up state branch pointer and jump to it" as some of the hottest part of that function. Which is just *evil*. You can
ISTR there are a bunch of state transitions per byte, which would make sense that it shows up on profiles.
Now, I'm just wondering if anybody knows if there are better zlib implementations out there? This really looks like it could be a noticeable performance issue, but I'm lazy and would be much happier to hear that somebody has already played with optimizing zlib. Especially since I'm not 100% sure it's really going to be noticeable..
I could have sworn that either Matt Mackall or Ben LaHaise had cleaned up the existing zlib so much that it was practically a new implementation. I'm not aware of any open source implementations independent of zlib (except maybe that C++ behemoth, 7zip).
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