Messages in this thread | | | Subject | Re: Structure vs purism ? | Date | Thu, 21 Jan 1999 08:47:01 +0100 | From | Helge Hafting <> |
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[...] > Just under 1000 goto's. Some of which are trivial. Goto's to one-liners, > which are easily tidied. Other files are real snakes-nests. Following the > trail of goto's as they double back on themselves is no fun for the brain, > even less so for a CPU, as modern features such as branch prediction are > misused. (Remember the branch prediction tables are a set size, and can > only store results of a few jumps). As far as I know - no branch prediction is invoked for a goto, because the jump is unconditional - and fast.
Tidying up is generally a good thing, but make sure you don't ruin any "fast-path" optimizations by doing so. (That's where the common code path is a small place that fits in the cpu cache, while all exceptional cases are treated elsewhere. Goto's might be useful for doing that.
Helge Hafting
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