Software April 6th, 2009
Patrick Stein

Much of the stuff that is supposed to be on this page has not yet moved over from the old website.

iPhone App Submitted To The App Store February 4th, 2010
Patrick Stein

I just submitted my first my first iPhone app to the App Store. Once it is approved, I will announce it here.

Speedy iPhone App Programming February 4th, 2010
Patrick Stein

Sunday, I decided that I needed a simpler statistics tracking program to keep track of stuff while I’m coaching volleyball. I started out keeping them on paper, but felt that I was staring at the page too often to find where to put a tick mark. Next, I tried the iVolleyStats Match iPhone app. It […]

Common Lisp vs. C/ASM: Battle FFT October 16th, 2009
Patrick Stein

Dr. David McClain of Refined Audiometrics sent me his code for interfacing with the Apple vDSP library. Here it is along with a Makefile that I put together for it: vdsp-wrapper.tar.gz. I have not actually run the code myself. I started to convert his Lispworks FLI code to CFFI code, but bailed on it in […]

Adventures in Package Dependencies October 14th, 2009
Patrick Stein

A variety of people have asked how the speed of my Lisp Fourier Transform Library compares to an FFI call to the FFTW Library. I downloaded the FFTW Library, built it, and installed it. Then, I tried to get someone else’s FFI wrappers for the FFTW Library going. I worked on this for two hours […]

Lisp Fourier Transform Library Faster Yet (v1.3) October 13th, 2009
Patrick Stein

I released version 1.3 of my Common Lisp Fourier Transform library today. It is significantly faster than yesterday’s version. On my MacBook Pro in SBCL 1.0.30 with a 512 by 512 by 16 array, version 1.3 takes 3.74 seconds where version 1.2 took 9.77 seconds and version 1.0 took 25.31 seconds. For a breakdown of […]

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