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Re: [Chicken-hackers] [PATCH] Mostly fix #1604

From: felix . winkelmann
Subject: Re: [Chicken-hackers] [PATCH] Mostly fix #1604
Date: Sat, 18 May 2019 18:15:07 +0200

> Finally, I ran into this head scratcher: I tried to replace = with eq? in
> the code and it sped up the code by a *lot*.  However, in fixnum
> arithmetic mode, = gets rewritten to C_eqp.  The difference in the C
> output is that the code that uses eq? directly gets this completely
> inlined in the same C function as the following subtractions.  The code
> that uses = will get the comparisons in a C function and then call a CPS
> function which does the subtractions.  Any ideas why this is?  It makes
> a massive difference, so I think it's worthwhile to at least understand
> what's going on here.

Can you give an example? What does "in the code" mean? What code?


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