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From: "Luis P. Mendes" <luislupeXXX@gmailXXX.com>
Subject: Need some light on using Ada or not
Newsgroups: comp.lang.ada
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Date: 18 Feb 2011 22:52:38 GMT
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Date: 2011-02-18T22:52:38+00:00
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Hi,

I have two projects to work, one of them in the data mining field and 
another regarding xml parsing.
I've been learning C++ (from a Python, Pascal, VB background), due to it 
being fast (sure it depends on the implementation) and because it has a 
lot of libraries.

But I find C++ a very complex language and Ada appeals to me specially 
for its overall safety.  Or maybe also because I don't like to go with 
majorities... :-)

I have some questions, however, that I'd like to be answered:
1. If Ada is more type safe and restricted than C++, how can it be 
significantly slower?
Please see: http://shootout.alioth.debian.org/u64q/benchmark.php?
test=all&lang=gnat
where for some tests, Ada is 2x, 3x, 4x and 5x slower.
For the data mining field as I want to implement, speed is essential.
I'll code in Linux and use gcc as a compiler/linker.

2. In C++ I can use lots of libraries. I'm thinking on data visualization 
libraries, for example http://www.graphviz.org/Gallery/undirected/
softmaint.html.
I've read that Ada can use some C bindings.  Can I use any C library? 
Some? Is it easy?
I don't want to drop C++ for Ada to build a project that later has to be 
rewritten in C++ because of lack of libraries.

3. Is there any kind of fast xml stream parser library? No DOM or SAX, 
just to read attributes.


Luis