Quite some time ago, I was contacted by Amazon for a position in the AWS DNS team. I was curious to hear more about it and agreed to enter their recruitment process. The 1st step was a coding challenge.

In this post I will described the challenge and my solution …

I recently came across an interesting problem at work: how to efficiently transpose a non-square matrix in-place?

One of my colleague is working on optimizing a six-steps FFT on our manycore processor, the MPPA-256. The six-steps FFT algorithm has a lot of nice properties, especially regarding highly parallel systems, but …