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Date: Fri, 2 Dec 2011 18:16:53 +0200
From: Tero Koskinen <tero.koskinen@iki.fi>
Newsgroups: comp.lang.ada
Subject: Re: Ann: Natools.Chunked_Strings, beta 1
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Date: 2011-12-02T18:16:53+02:00
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On Wed, 30 Nov 2011 12:39:36 -0700
Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org> wrote:
> Justifications for rewriting Unbounded_Strings are
> 
> 1. For fun
> 2. As a learning experience
> 3. You have timing requirements you can't otherwise meet.

4th case is portability across compilers if you need to have more than
32K bytes of data.

At least Janus/Ada has 16-bit Integers and the size of the
Unbounded_String is limited to Integer'Last.

For example, in my Twitter/Identi.ca client[1], I need to handle
40K..100Kbytes long JSON data from the server and that cannot fit
into Unbounded_String when I use Janus/Ada.

I also run into 3rd item with ICCAda. In my Twitter use case, appending
data and then reading it from Unbounded_String, is multiple times
slower with ICCAda than with Janus/Ada or GNAT.

-- 
Tero Koskinen - http://iki.fi/tero.koskinen/
[1] https://bitbucket.org/tkoskine/ladybird