From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,5642b5e0552e165e,start
X-Google-Attributes: gid103376,public
From: herwin@gmu.edu (Harry Erwin)
Subject: Performance and Thread Safety of the Booch Components
Date: 2000/04/21
Message-ID: <1e9flrw.13c8d0t190e9v6N%herwin@gmu.edu>#1/1
X-Deja-AN: 613952675
Organization: HDE Associates
X-Server-Date: 21 Apr 2000 13:33:10 GMT
User-Agent: MacSOUP/2.4.5
Newsgroups: comp.lang.ada
Date: 2000-04-21T13:33:10+00:00
List-Id: <comp.lang.ada>

Disclaimer: my expertise is much deeper for C++ than Ada.

Experience with the STL in C++ has shown that the standard container
classes and associated algorithms degrade performance severely unless a
significant level of optimization is turned on. This is in part due to
the number of temporary objects and function calls that get generated.
On the other hand, with optimization, they about as fast as the best
hand-tuned code. What is the experience with the Booch Components in Ada
95? They look at least as well-designed as the STL. Are they also slow
unless optimization in enabled? If so, what level of optimization is
needed?

The thread-safety of the STL is a problem for strings, which are by
default COW in most compiler implementations. Are there similar issues
for any of the Booch components that I should be aware of?

The Booch components appear to be generally exception-safe and
exception-neutral. Are there any issues known that I should be aware
of?--other than one esoteric bug involving copying between queues of
different types that I've already reported.

-- 
Harry Erwin, PhD, <herwin@gmu.edu>, Bat Researcher, Senior SW Analyst 
and Security Engineer, and Adjunct Professor of Computer Science, 
George Mason University.