Archives of #Ups

StartupChile (Round 2.1) all finished, thoughts

The odd thing is that I’ve been trying to write this post for 3 months. Having started and stopped several times (including during the flight back from Chile on Oct 15th) I figure I ought to put something out. The journey was, it turns out, somewhat of a roller-coaster ride. Early in January Kyran Dale […]

High Performance Python 1 from PyCon 2012 (slides, video, src)

This is the follow-on for my PyCon 2012 notes from the end post. I gave a 3.5 hour tutorial on High Performance Python 1, below I link to the slides, the video and the source code. UPDATE2 From October 2014 I’ll be training on High Performance Python and Data Science in London using Python – […]

Demoing pyCUDA at the London Financial Python User Group

On Wednesday night I jumped on a train up to London to visit the London Financial Python User Group to give a short demo of pyCUDA. I’m using CUDA heavily for my physics consultancy and I figured the finance guys would be interested in 10-1000* speed-ups for their calculations. The raw figures and the Mandelbrot […]

22,937* faster Python math using pyCUDA

I’ve just uploaded a new demo for pyCUDA, it adds a new calculation routine that straddles the numpy (C based math) and the pure-CUDA implementations. In total there are 4 variants to choose from. The speed differences are huge! Update – this Reddit thread has more details including real-world timings for two client problems […]

pyCUDA on Windows and Mac for super-fast Python math using CUDA

I’ve just started to play with pyCUDA which lets you run parallel math operations on a CUDA-compliant NVidia graphics card through Python. Update – I’ve written a High Performance Python tutorial (July 2011, 55 pages) which covers pyCUDA and other technologies, you might find it useful. CUDA stands for Compute Unified Device Architecture – it […]

£5 App Music-Themed Xmas Special

On Wednesday night we ran our music-themed £5 App Xmas Special ( It was fab!  John and I had a fab time organising things and watching the night run so down-to-earthly – it seems that many others did too.  I particularly like: “I bloomin’ love £5 app! The event that’s happy to be itself, and […]

How I’m writing The Screencasting Handbook

Many people have asked why I’m writing a book without a publisher.  The story has interested a bunch of people so I’ll outline the basics here. Update: there’s a related article by Marc-André Cournoyer covering how he wrote his “Create your own programming language” eBook. I started writing The Screencasting Handbook in the middle of […]

The Micropreneur Academy

Rob Walling has been working to build the Micropreneur Academy – a focused site aimed at MicroISV’s who want to grow their businesses into high-value, fast-growth affairs (original May announce). He contacted me a few months back to ask if I’d like to contribute an article on how screencasts can boost sales of software products, […]