Re: [Sbcl-help] system-area-pointer: compiler note

[Thomas F. B. <tbu...@gm...>]

2010/6/24 Christophe Rhodes <cs...@ca...>:
> If FUN were an inline function, or a local function, rather than an
> external function (however arbitrarily tightly type-declared), this
> pointer coercion (heap allocation) wouldn't need to happen.

What might not be obvious from Christophe's reply is the most common
way (in my experience) for FUN to be a local function. If SAP-TEST1 is
inlined and FUN is a local function for the call site.

The trick is to put all your mapping functions (which is what I assume
this was derived from) in one file, all declaimed inline. Their
compilation will generate lots of notes, but that's okay. What you
care about is the call sites, and making sure you get the
local-function optimizations you need there.