Re: Structure vs purism ?
Helge Hafting (helge.hafting@daldata.no)
Thu, 21 Jan 1999 08:47:01 +0100
[...]
> 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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