Actually, this is just a standard switch statement,-- not Duff's device.

On the clarity argument, it's very much in the eye of the beholder whether your if cascade (or the and cascade) is clearer than the computed-goto version?

For completeness, the computed goto version works out an average of over 60% faster than either of the cascade versions, which is rather more than a few dozen clock cycles.

Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
"Memory, processor, disk in that order on the hardware side. Algorithm, algorithm, algorithm on the code side." - tachyon

In reply to Re^2: fall through switch/case in perl by BrowserUk
in thread fall through switch/case in perl by ykar

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