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Newsgroups: comp.lang.ada
Subject: Re: Q: compiler generated timing checks
From: Georg Bauhaus <bauhaus@arcor.de>
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Date: Tue, 06 Feb 2007 23:45:32 +0100
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Date: 2007-02-06T23:44:41+01:00
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On Tue, 2007-02-06 at 23:27 +0100, Georg Bauhaus wrote:

>    procedure compute(X: in out T);
>      -- uses a weird algorithm in "TIME(3 * X**2)" and "SPACE(X*log(X))"
> 
>    pragma Complexity
>       (Space,
>        On => compute,
>        Order => Square,
>        Input => (1 => X),
>        Factor => (1 => 1));
> 
>    pragma Complexity
>       (Time,
>        On => compute,
>        Order => N_Log_N,
>        Input => (1 => 10_000), -- should be magic_of(X)?
>        Factor => (1 => 3));
> 
> end Tempus_Fugit;
> 
--- foo.ada     2007-02-06 23:37:03.000000000 +0100
+++ foo-new.ada 2007-02-06 23:38:49.000000000 +0100
@@ -11,14 +11,14 @@
    pragma Complexity
       (Space,
        On => compute,
-       Order => Square,
+       Order => N_Log_N,
        Input => (1 => X),
        Factor => (1 => 1));

    pragma Complexity
       (Time,
        On => compute,
-       Order => N_Log_N,
+       Order => Square,
        Input => (1 => 10_000), -- should be magic_of(X)?
        Factor => (1 => 3));

Sorry.