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#Rayman speed

7 messages in this thread

#156936From: Mike KearneyMar 3, 1995 4:01 PM

Stefan, I understand Rayman is optimized for the Pentium. I am using a 66 MHz 486. Could you indicate about how much speed improvement can be expected with a Pentium? Thanks, Mike

#157039From: Michael BassierMar 4, 1995 8:14 AM

Mike, I made some little benchmarks with the results I`ll explain below. I used a 486/66 VLB with 256 KB second-level cache and a Dell Omniplex Pentium/66 PCI with 256 KB cache. All machines had 32 MB RAM. The config.sys and autoexec.bat are the same on both machines. Virtual Memory Management was not used. I used three demo scenes (included in your RayMan package): alessi.3ds, cocktail.3ds, bottle.3ds. I rendered the scenes with 3DSR4 and RayMan Release 1.01. RayMan was up to 3 times faster on the Pentium than on the 486. 3DSR4 was up to 2.1 times faster on the Pentium than on the 486. This means probably that the Pentium optimization brings a clear speed advantage. Michael

#157284From: Mike KearneyMar 6, 1995 10:45 AM

Michael. Thanks for the benchmarks. The Pentium will be my next machine.

#157156From: Stefan ElsnerMar 5, 1995 12:09 PM

Mike, three times should be the average speed gain when upgrading from a 486/66 to a Pentium with RayMan. Regards, Stefan

#158834From: Jim HawkinsMar 14, 1995 6:19 AM

Stefan, I have a 486/50 with 16MB of RAM. How much of an improvement in speed do you think might be realized if I add another 16MB to make 32 MB? Jim Hawkins

#159468From: Stefan ElsnerMar 17, 1995 8:27 AM

Jim, <<How much of an improvement in speed do you think might be realized if I add another 16MB to make 32 MB?>> This depends on the situation. If the mesh file fits into memory and no VMM is needed for the space subdivison, then more RAM will show minor improvements as only the space subdivison might be slightly better. With your special situation (143k faces) you will experience a significant increase in rendering speed with 32MB RAM, as the whole space subdivison data is now on your hard disk during rendering. In a highly reflective scene as yours this leads to a considerable amount of disk accesses. It is hard to say how much the speed increase is as it depends also on your hardware, etc.. I would estimate something like four times. Regards, Stefan

#159494From: Jim HawkinsMar 17, 1995 11:01 AM

Stefan, Thanks for the response. It sounds like the memory is a good investment. I'll need it anyway for Windows NT development. Thanks, Jim Hawkins