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From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: GNAT's stack checking in Ubuntu 9.04 (and Shootout regex-dna)
Date: Tue, 04 Aug 2009 11:38:03 -0400
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Date: 2009-08-04T11:38:03-04:00
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Georg Bauhaus <rm.tsoh.plus-bug.bauhaus@maps.futureapps.de> writes:

> More guesswork: Is an empty Unbounded_String a heavy
> construct?

If you're trying to make a program fast, you almost certainly don't want
to be using unbounded strings, or any other controlled types.  At least
not in any time-critical parts.

Controlled types use a lot of memory, and are quite slow.

AdaCore is working on improving this situation, but controlled types
will always be somewhat heavy.

- Bob