Subject: Re: one-time initialization
From: John Prevost <firstname.lastname@example.org>
Date: 28 Jan 1999 04:54:07 -0500
In-Reply-To: Michael Hicks's message of "Thu, 28 Jan 1999 00:08:23 -0500 (EST)"
Michael Hicks <email@example.com> writes:
> I wonder if anyone knows how to optimize the following (simplified for the
> sake of dicussion) situation:
The only alternative I can think of that might provide a significant
performance boost is to make the reference a "default" value when the
initialization hasn't yet been done. Another alternative that may win
some speed (but I sort of doubt it) is to make the reference be to a
function that raises an exception, like so:
val global = (ref (fun () -> failwith "not initialized") :
(mytype -> unit) ref)
let init i = global := fun () -> i
let f () = ... (!global ())
let g () = (!global ()) ...
this at least has the advantage that you don't have to have a big
hairy pattern match in every function.
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