Date: Wed, 14 Apr 93 13:08:28 EDT
From: DJ Delorie <dj AT ctron DOT com>
To: jd50 AT prism DOT gatech DOT edu
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: djgpp v.s. Borland C++ 3.1

> (This is suprsing to me because I thought these native DOS compiler
> should do a better job in terms of speed.)

Native compilers will perform I/O faster, especially disk I/O, since
the extender needs to do an extra copy of the data to get it into real
mode space.

djgpp will beat any native compiler for memory performance and integer
arithmetic, if the application will take advantage of the 32-bit
architecture and lack of segment register operations.

A 16-bit program using 16-bit integers is comparable to a 32-bit
program using 32-bit integers, though, and floating point performance
is almost identical.

DJ