Recently I have updated our Grails 2.3 based web application to Grails 2.4. Although the 2.3 release was working fine, one doesn’t want to fall too far behind. I know out of experience that this can happen very fast. If you wait too long, then at some point the migration to a newer version is almost like starting from scratch, instead of just updating a few lines of code to accommodate for deprecated APIs. The biggest problem I encountered going to version 2.4 was a behavioral change regarding the validation.
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Tag: Tutorial
Performance Iterating Directories Revisited
I have written about the performance of iterating directories before, in the context of Java and its switch from version 6 to 7 that brought with it the new Java NIO API. For whatever reason I felt the urge to do something similar again, but this time I wanted to compare two different approaches to recursively scanning a directory’s contents:
- Use recursive function calls (a function that calls itself over and over again for each directory)
- Use an iterative approach (a function keeps a list of directories and iterates this list)
To make things more interesting, I implemented this in C++ using the Windows API and the Qt framework, in C# in combination with its buddy the .NET framework and, for good measure, I also threw in the old Java code from over a year ago.
Update (26.12.2014): I added additional data at the bottom of the article.
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C# LINQ Performance vs. Iteration
It’s been a while since I have written something related to programming. Time to remedy that.
Just recently my interest for the C# language rose again and to get back up to speed with the fundamentals I swallowed all videos of an absolute beginners guide on Microsoft Virtual Academy. Something that has been touched briefly was LINQ and my initial thought was: how’s the performance of that compared to how I would usually write it in C++ – where my expertise is?
Mind you, I’m not comparing C# vs C++, but merely LINQ vs. old-school iteration. Let’s go and find out.
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Controlling a Mac’s fans (AppleSMC)
Since the iMac found its way onto my desk I’ve been bothered with the heat generated when playing Diablo 3 (or possibly any other game) – just as with the MacBook Pro. The only difference: The MacBook’s fans were howling to stop the torment, the iMac just swallows the pain it seems. Don’t get me wrong, the system is not overheating and temperature is well within its limits. In fact, the CPU doesn’t even really heat up. It’s more the graphics chip and the power supply. But for me as a former PC user who built all the PCs himself and always had a good (and mostly quiet) cooling this is just a bit unusual.Read More »
The Codeslinger 