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  1. Compilers traditionally optimize only within each...

    Compilers traditionally optimize only within each function, not across functions. There are two reasons for this, which are kinda linked. To optimize across functions means you need to know all the...
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    So your agree that mechanical drives die, just...

    So your agree that mechanical drives die, just like SSDs, but your argument is that they are better because you have a chance of extracting the data off them? Damn, I'm glad you're not in charge of...
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    Black2 is not a hybrid drive, not even close....

    Black2 is not a hybrid drive, not even close. It's flash drive and a mechanical drive stuck in the same package, but with ZERO management of the data caching. It presents to the OS as two drives.
    ...
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    Play and drivers are essential to actually...

    Play and drivers are essential to actually running Android apps...
    The whole point of Google's update strategy is to move more and more of the app-level APIs (ie the equivalent of the newest parts...
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    I've no interest in this inane "debate"; but I'd...

    I've no interest in this inane "debate"; but I'd point out that there is this thing called Android, based on Linux, and, it just so happens that the part that is released as open source is "entirely...
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    Apple DOES release plenty of their mods to BSD. ...

    Apple DOES release plenty of their mods to BSD.
    CUPS is basically Apple. Everything related to mDNS is Apple. GCD is Apple. launched is Apple.

    What exactly are the widely relevant to the outside...
  7. I find this article disappointing. I hope you do...

    I find this article disappointing. I hope you do better with the final version.
    If you're going to test Mavericks honestly, it would make sense to, at the very least, include tests of the features...
  8. There's a lot of thoughtlessness in the comments...

    There's a lot of thoughtlessness in the comments above.

    This is not only about Linux. Yes, Linux can compile under gcc, and if everyone in Linuxland is happy with that, fine.

    But this is also...
  9. Interesting (and remarkable) that we get such a...

    Interesting (and remarkable) that we get such a regression from -ffast-math. It'd be interesting (if it's not a hassle) to learn why.
    One possibility (which may or may not be the case) is that...
  10. Oh, one thing to add to my earlier comment. LLVM...

    Oh, one thing to add to my earlier comment.
    LLVM (and maybe GCC, but I don't know there) will not automatically vectorize many FP loops if fast-math is not enabled because getting the loop to...
  11. XCode 5 also has a -Ofast (whose main effect is...

    XCode 5 also has a -Ofast (whose main effect is fast math, but also sets one or two other settings that I forget). I don't know if that has made it into mainline LLVM yet.

    [XCode's defaults are...
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    Haters gonna hate. Regardless of logic,...

    Haters gonna hate. Regardless of logic, regardless of history, regardless of facts, regardless of common sense...
  13. The loops are ALREADY vectorized. This is about...

    The loops are ALREADY vectorized. This is about vectorizing code that is NOT in loops.

    The essential ideas behind this have been working for a while now. The essential bottleneck has been a good...
  14. Did YOU read the article? There are two...

    Did YOU read the article?

    There are two aspects to vectorization (actually to any optimization, but it's most obvious for vectorization):
    - there is generating optimal code (given the ISA, the...
  15. Color management doesn't help if all you want to...

    Color management doesn't help if all you want to say is simply "draw that pixel at R=25, G=27, B=105".

    Where it helps is when you want to display say a JPEG that is tagged with color info. In...
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    One of the reasons LLVM has taken off like...

    One of the reasons LLVM has taken off like wildfire is that it easy to modify and easy to use as the basis for research projects, and there are plenty of such projects, both in companies and at...
  17. One thing I would like to see, with all these...

    One thing I would like to see, with all these benchmarks, is some analysis of why we are seeing what we are seeing.
    For example, in the aggressive improvements we have seen, is there reason to...
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