From: utzoo!decvax!ucbvax!info-cpm
Newsgroups: fa.info-cpm
Title: BDS-C Benchmarks
Article-I.D.: ucbvax.272
Posted: Wed Dec  8 00:39:56 1982
Received: Thu Dec  9 01:24:15 1982

>From chesley.tsca@Sri-Tsc  Wed Dec  8 00:35:14 1982
To: INFO-CPM@Mit-Mc
Via:  Sri-Tsca; 7 Dec 82 11:35-PST
Via:  Mit-Mc; 7 Dec 82 15:01-EST
Via:  Brl; 7 Dec 82 15:20-EST
Via:  Brl-Bmd; 7 Dec 82 15:23-EST

	One thing to watch out for when doing BDS-C benchmarks is the
huge difference between the code generated with no switches, and that
generated with -o and -e (and making any variables that can be globals).
(The person doing the Aztec benchmark didn't mention which way he did it.)
	I recently did a benchmark of BDS-C versus C/80, using the Byte
prime number program.  Without -o and -e, BDS-C took 41 seconds (this is
timed from after the program loads to the next "A>" prompt (i.e., after
the reboot), and thus may not compare to other numbers times from different
points).  With -o and -e, it took 17 seconds!  C/80 took (if I remember
correctly) 28 seconds.
	--Harry...