karplus@ararat.ucsc.edu (Kevin Karplus) (11/30/90)
The "benchmark" echo 2^5000/2^5000 | /bin/time bc seems to have poor predictive power for other applications. Here are results on different Suns (all diskless workstations with at least 8Mbytes of RAM): Sparcstation SLC 44.5 real 43.4 user 0.1 sys 3/80 33.3 real 28.7 user 1.0 sys 4/110 26.8 real 26.3 user 0.1 sys Sparcstation 1+ 12.2 real 12.0 user 0.1 sys Note that the 3/80 appears faster than the Sparcstation SLC! Having used both machines for months, I can assure you that the SLC is easily a factor of two or three faster on most applications (except compilation and linking, which are I/O bound on my diskless SLC). Does anyone have an explanation for the unexpectedly poor performance of the SLC on this trivial benchmark? All three of the Sparc-based machines were running the same copy of "bc", so it isn't a difference in compilation. Kevin Karplus
zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff) (12/02/90)
Anyone know why a Sun 3/50 is so much slower than a 3/60? -- Jon Zeeff (NIC handle JZ) zeeff@b-tech.ann-arbor.mi.us