Re: [Haskell-cafe] Re: does the compiler optimize repeated calls?

Furthermore, doing that optimization (common subexpression elimination) can lead to space leaks. So you should not count on the compiler doing it. Besides, I often find it more readable and less error prone to name a common subexpression; only one place to change when you need to change the call. -- Lennart On Sep 6, 2006, at 08:38 , Stephane Bortzmeyer wrote:

[Warnings: newbie and not having tested or read the generated assembly code.]

On Wed, Sep 06, 2006 at 09:32:07AM -0300, Alex Queiroz wrote a message of 18 lines which said:

...

I am a newbie myself (second week of learning Haskell), but I'll give it a shot: Since functions have no side effects, the compiler executes the function only once.

Sure, "pure" programming languages *allow* the compiler to perform such optimizations but it does not mean it is *actually* done (promises are cheap but writing compiler code is expensive).

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