Messages in this thread |  | | Date | Fri, 6 Jul 2001 02:38:35 -0600 | From | Cort Dougan <> |
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I'm talking about _modern_ processors, not processors that dominate the modern age. This isn't x86. I don't believe that even aggressive re-ordering will cause a serious hit in performance on function calls. Unconditional branches are definitely predictable so icache pre-fetches are not more complicated that straight-line code.
Measurement is more important, though. I've rejected a number of optimizations from people (including many of my own) that were "obvious enhancements" because of what they showed in real-world measurements. If it doesn't run faster, despite the theory being "right", it's worthless. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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