From: tmoran@acm.org
Subject: Re: 'Write attribute vs Write procedure.
Date: Wed, 21 May 2003 00:42:33 GMT
Date: 2003-05-21T00:42:33+00:00 [thread overview]
Message-ID: <ZXzya.660213$OV.619773@rwcrnsc54> (raw)
In-Reply-To: MPG.1934e1948ad1faf989709@News.CIS.DFN.DE
> Write (This.Link.all,
> Buffer (1 .. Stream_element_offset (Chunk)));
> Stream_element_array'Write (This.Link,
> Buffer (1 .. Stream_element_offset (Chunk)));
>...
> the Write procedure is taking no noticeable amount of time/cpu.
>In the contrary, the 'Write attribute takes like 3-4 seconds of 100% CPU
Perhaps Gnat's 'Write is doing one 'Write(Stream_Element) call for
each element of the Buffer, vs a single call for the whole thing in
the procedure version? Since you've already got a Stream_Element_Array,
perhaps you could call
Ada.Streams.Write(Ada.Streams.Root_Stream_Type'class(This.Link),
Buffer (1 .. Stream_element_offset (Chunk)));
directly?
Personally, I think using the default 'write is only reasonable
in the very simplest cases. If something is big, or complicated,
I'd write my own 'write for it.
next prev parent reply other threads:[~2003-05-21 0:42 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-21 0:07 'Write attribute vs Write procedure Jano
2003-05-21 0:42 ` tmoran [this message]
2003-05-21 7:48 ` Ole-Hjalmar Kristensen
2003-05-21 9:23 ` Ole-Hjalmar Kristensen
2003-05-21 16:22 ` tmoran
2003-05-22 7:51 ` Ole-Hjalmar Kristensen
2003-05-21 16:24 ` tmoran
2003-05-21 21:17 ` Simon Wright
2003-05-22 8:02 ` Ole-Hjalmar Kristensen
2003-05-22 13:49 ` Marc A. Criley
2003-05-22 20:07 ` Simon Wright
2003-05-23 6:09 ` Craig Carey
2003-05-23 19:55 ` Simon Wright
2003-05-23 20:48 ` AI-248 and counting the elements in an external file Larry Kilgallen
2003-05-23 21:12 ` Stephen Leake
2003-05-23 21:45 ` Randy Brukardt
2003-05-24 1:45 ` Larry Kilgallen
2003-05-24 22:00 ` Robert I. Eachus
2003-05-25 3:54 ` Larry Kilgallen
2003-05-27 20:19 ` Randy Brukardt
2003-05-27 20:57 ` Larry Kilgallen
2003-05-28 18:26 ` Randy Brukardt
2003-05-24 1:42 ` Larry Kilgallen
2003-05-28 21:17 ` Brian Gaffney
2003-05-28 22:06 ` Larry Kilgallen
2003-05-24 14:11 ` 'Write attribute vs Write procedure Craig Carey
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