matthias's blog

performance of different scripting languages: shell v. perl v. python v. ruby V2

A little while ago I did some testing on the performance of different scripting language and summarized my findings as performance of different scripting languages: shell v. perl v. python v. ruby.

Well, I got some questions about versions and some suggested that the Ruby version I was using was known to be a poor performer. So after I upgraded the box I used for testing to Ubuntu 12.04 I decided to install Ruby 1.9 and re-run the tests.

easy emusic downloads in ubuntu

I'm an emusic subscriber and I found it remarkably challanging to get the emusic downloader (emusicdlm) to open the emusic download files. Well after some digging and find various hints on the topic I found a comfy way to do it.

Essentially you just need to create a config file that associates the

So open up a text editor or use cat to populate a file named ~/.local/share/applications/emusicdlm.desktop with the following

redundant DNS on ubuntu using IP takeover via heartbeat and pacemaker

When DNS is unavailable the internet always seems down. And sometimes it's just really really slow waiting for timeouts. The other day the primary DNS server in my house failed and I once again thought that there had to be a better way. Since I already have a DNS slave I started hitting google land for ideas like anycast and load balancing. Lot's of research later I found that I essentially had 3 choices:

swappiness on Ubuntu Desktop 11.10

Some things are surprising. My system has been feeling sluggish and I've been cleaning out stuff, fixing things, etc to make things more peppy on my 2 year old netbook which has been upgraded to each new version of Ubuntu Desktop. I was looking at the output of the free command a couple of days ago and found something odd. It showed swap being used. Not much, but I still had currently free memory. I know that can happen, but I was curious anyway.

google chrome performance getting worse ... maybe not

I've been noticing that my google chrome, the lord of speed, has been just not running as fast as it used to. I also read a recent blog post about some very significant improvements in the speed of firefox. That had me wondering, but not enough to really dig in until today. I think I found an issue on Ubuntu ...

Today I was looking at $HOME/.xsession-errors and noticed the following line:

[] Error initializing NSS without a persistent database: cannot open shared object file: Permission denied


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