An Android blog post about optimizing memory-related issues alvin March 1, 2017 - 5:33pm

The Android Developer’s Blog has a good article on how to optimize various memory attributes of Android applications, titled, Getting Santa Tracker Into Shape. A nice thing about their project is that they make their source code available on Github.

Optimizing Linux for slow computers

This is a link to an article titled, “Optimizing Linux for slow computers.” Note that this article links to this more thorough resource on

Here are a couple of paragraphs from it:

When tuning a server, you'll really want to tweak for performance and high throughput. That's where most Linux configurations really shine over the competition: they come better tuned to get the most out of server configurations.

Ubuntu running on a 2008 27” iMac

As shown in the image, I just installed Ubuntu on my 2008 27” iMac. The UI is interesting, a combination of MacOS and Windows. From what I’ve seen, I think I’ll like the Ubuntu UI (Unity) more than Linux Mint, but I’m open. So far Ubuntu is also significantly faster than the latest versions of MacOS were on the same hardware, though that may be because MacOS had a few hundred thousand more files on it than Ubuntu has at the moment.

iPhone/iOS: How to quit using cellular data when using WiFi alvin January 14, 2017 - 3:21pm

I live in Colorado, where cellular reception can be very hit or miss. As just one example there are only two spots in my apartment where I can make a phone call. So when I’m at home trying to view a website using Safari on my iPhone and the page is loading really slow, I find it really annoying that my iPhone is trying to use my cellular data rather than my home wireless network (WiFi).

Note: Apple implies that the cellular data is “assisting” the WiFi, but with the poor cell reception here, I can confirm that this feature just slows down my iPhone internet speed.

You may not need to use StringBuilder in Java any more alvin December 23, 2016 - 12:13pm

Here’s a short article on that explains why you might not need to use StringBuilder in Java any more.