Which is faster?

lak wrote:

Which is faster? Post Increment or assignment? Why?
I was not able to get any things.

/Usually/ -- I very carefully am not saying /always/ -- the
timing difference between using an auto-increment/decrement,
pre or post, vs an assignment like `spoo += 1`, is not
detectable in a run of an application.

This is because compilers are pretty smart and (although they
may need a little encouragement) will compile the various
different ways of saying "increment spoo" into the same
code, if that's legal. And I/ isn't cheap.

And the Standard doesn't say /anything/ about what the relative
costs are.

So, if it matters -- I say, /if/ it matters -- the faster thing
to use, if there is one, has to be determined by experiment,
and you have to realise that which the faster one is can change
as soon as you change machines, compilers, compiler options,
memory size, air conditioning, or the colour of your tie.

, which is to say, usually, pick whichever most
clearly expresses your intent to your audience.

--
'It changed the future and it changed us.' /Babylon 5/

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