Rob Janssen

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Code Incomplete

The quality of having a modest or low view of one’s importance. Humility is the single character trait above all others, that will ensure you evolve as a programmer (or developer, engineer, title du jour).

The Economic Value of Rapid Response Time

This paper was published in November, 1982 and was written by: Walter J. Doherty, Manager of Systems Performance and Technology Transfer for the Computing Systems Department at IBM's Thomas J. Watson Research Center Ahrvind J.

When UTF8 != UTF8

Recently I encountered a problem with umlauts in file names. I had to read names from a directory and find and update the appropriate entry in the database. So if I had a file named hund.pdf (Hund is German for dog) I had to find the corresponding record in the database and attach the file.

System Administration Screencasts

Sysadmin Casts - simple bite sized sysadmin screencasts (released weekly) Browse Episodes #28 - CLI Monday: cat, grep, awk, sort, and uniq (Duration: 7 minutes, Published: Jul 14, 2014) In this episode, I would like to show you a series of commands for reviewing log data, how to extract eve

mapcode.com

What is a mapcode? A mapcode represents a location. Every location on Earth can be represented by a mapcode. Mapcodes were designed to be short, easy to recognise, remember and communicate. They are precise to a few meters, which is good enough for every-day use.

The camel doesn’t have two humps: Programming “aptitude test” canned for overzealous conclusion

From Larry Summers to James Watson, certain scientists have a long and questionable tradition of using “data” to make claims about intelligence and aptitude.

The Nature of Code

Hello! By browsing the table of contents on your left, you can read the entire text of this book online for free, licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. Please submit corrections to the book on my Nature of Code GitHub repo.

dotScale 2014 - Robert Kennedy - Life in the Trenches of healthcare.gov

Filmed at http://dotscale.io in Paris on May 19, 2014.More talks at http://dotconferences.ioRobert is a former SRE for Healthcare.gov and a software Engineer at Google

Optimizing dynamic JavaScript with inline caches · sq/JSIL Wiki · GitHub

This is an overview of an optimization technique I've been using in JSIL for a while, where you create and update polymorphic inline caches in your JavaScript code at runtime so that it can stay fast while adapting to unexpected changes.

Tradeoffs in High Performance Software

I’ve spent down the past week tracking down an absolutely brutal bug inside Akka.NET. Sometimes the CPU utilization of the system will randomly jump from 10% to 100% and stay pegged like that until the process is recycled.

This Read-It-Later-list is just that, bookmarks of stuff I intend to read or have read. I do not necessarily agree with opinions or statements in the bookmarked articles.

This list is compiled from my Pocket list.