Compendium of Wondrous Links vol XI

It has been a while since the last time. More food for though! Python Python 3 upgrade strategy. The time has come to take migrating to python 3 seriously. Another addition to Python-to-c++ compilers, in a similar way to Cython: Pythran. I tested it with code from my recent post $7.11 in four prices and the Decimal type, revisited and it worked quite well, though it’s arguably a very simple test. Speed was quite good, better than Cython, actually. Powering the Python PyPI. These people deserve a lot of credit. PyPI is really important… Read More

$7.11 in four prices and the Decimal type, revisited

I happen to take a look to this old post in this blog. The post is 7 years old, but still presents an interesting problem. “A mathematician purchased four items in a grocery store. He noticed that when he added the prices of the four items, the sum came to $7.11, and when he multiplied the prices of the four items, the product came to $7.11.” I wanted to check my old solutions again, with the things that I learn in the last years. At that time, I was still a newbie in… Read More

ffind v1.0.2 released!

The new version of ffind (1.0.2) is available in GitHub and PyPi. This version includes the ability to execute python modules and scripts directly and some other minor improvements. Happy developing!

Happy 25th Anniversary, Python

25 years ago, on 20th February 1991, Python 0.9.0 was released publicly… I absolutely love it and use it everyday, and it seems to be as successful as ever… For another great 25 years! Cheers!  

Do not spawn processes on users requests

I’ve been playing recently an online game that has recently launched, that uses the following idea. When a user starts a match, it spawns a process in the server that acts as the opponent, generating the actions against the user. The game had a rough launch, with a lot of problems due it being played by a lot of people. And, IMHO, a lot of the problems can be traced to that idea. I see it’s a seductive one. If a user generates an interaction with the service that takes time (for example, a match for… Read More

All you need is cache

What is cache More than a formal definition, I think that the best way of thinking about cache is an result from an operation (data) that gets saved (cached) for future use. The cache value should be identifiable with a key that is reasonably small. This normally is the call name and the parameters, in some sort of hashed way. A proper cache has the following three properties: The result is always replicable. The value can be scrapped without remorse. Obtaining the result from cache is faster than generate it. The same result will be used… Read More

Gorgon: A simple task multiplier analysis tool (e.g. loadtesting)

Load testing is something very important in my job. I spend a decent amount of time checking how performant are some systems. There are some good tools out there (I’ve used Tsung extensively, and ab is brilliant for small checks), but I found that it’s difficult to create flows, where you produce several requests in succession and the input depends on the returned values of previous calls. Also, normally load test tools are focused in HTTP requests, which is fine most of the time, but sometimes is limiting. So, I got the idea… Read More

The most annoying thing about online advertising

Right now there is a lot of discussion about how invasive and intrusive online advertising is, including the effects it has in performance. The funny part? I am still getting advertising that hardly qualifies as “targeted” or “interesting“. By now the whole internet should have a lot of contextual information on where I spend my time, what are the pages I read, and what interest me. What kind of ads I see? The same products I see on the broad TV. Just the usual cars, insurance, cleaning products. Plus the  spammy “you’re the 10,000,000th… Read More


I have to say that sometimes I am incredibly surprised with some things. The last one has been to transform an old typewriter into a valid USB keyboard. This baffles me, because I am old enough to remember a word with typewriters. Well, I’m not that old. I only used a typewriter very briefly, on my school years, but I was close enough to people using them, most in particular, my grandfather. My grandfather was a journalist and writer, and for most of his life, he used a typewriter for quite a long time… Read More

Compendium of Wondrous Links vol X

More interesting reads worth checking out Tech Use Python on AWS Lambda instead of JavaScript. Create Escher like images using Julia. BeeWares, a collection of tools to help in all the phases of Python development Crete project templates with Cookie Cutter. An interactive Maze Solver. About development I’ve still confused with this “learning code is cool”, as this article says. I’m not sure if this is a bad time to be a beginner.  Yes, it’s true that too many options is confusing, but the amount and quality of instructional material at the moment is… Read More