From mlarsson@panix.com Fri Apr 28 15:24:20 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!panix!mlarsson From: mlarsson@panix.com (Mike Larsson) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr28.152420.2967@panix.com> Date: Fri, 28 Apr 1995 15:24:20 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Anyone running this on a Quadra 840AV with the 68040? -- Mike Larsson | mlarsson@panix.com PGP Key fingerprint: 43EC 5884 CABF E7B2 "Keep the channels open." From hkuznetsov@clari.net Sat Apr 29 23:18:20 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!hkuznetsov From: hkuznetsov@clari.net (Heather Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr29.231820.9818@clari.net> Date: Sat, 29 Apr 1995 23:18:20 GMT References: <1995Apr28.152420.2967@panix.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Apr28.152420.2967@panix.com>, mlarsson@panix.com (Mike Larsson) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Heather Kuznetsov "We don't sign stars. We build them." Acorn RiscPC 600 / NEXTSTEP 3.3 From sweber@berkeley.edu Sun Apr 30 16:42:20 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!sweber From: sweber@berkeley.edu (Sun-mi Weber) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr30.164220.1811@berkeley.edu> Date: Sun, 30 Apr 1995 16:42:20 GMT References: <1995Apr28.152420.2967@panix.com> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr28.152420.2967@panix.com>, mlarsson@panix.com (Mike Larsson) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Sun-mi Weber *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0