[Haskell-cafe] Re: What I learned from my first serious attempt low-level Haskell programming

[Lennart Augustsson]

So then tail calls should be very cheap when most of the arguments  
don't change.

On Apr 10, 2007, at 10:17 , Simon Marlow wrote:

> Lennart Augustsson wrote:
>> It's not that hard to figure out an order to permute the arguments  
>> on the stack before a tail call that minimizes that number of  
>> moves and temporary locations.  Lmlc did this 20 years ago. :)
>
> Right, and that's what GHC does too, with a strongly-connected- 
> component analysis of the dependencies between assignments of the  
> args for the tail call.
>
> Cheers,
> 	Simon