Ljubljana, Slovenia

Optimization

Optimization strategy
Sometimes it's not about just optimizing CPU time away. Looking at the details I could optimize away a badly written SQL query along with some more trivial big-O problem in regard with sorting of video clips which I got out of serialized data. All from a few carefully placed calls. Reducing network bandwidth is just as important as CPU time.
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In process performance statistics with Redis
Every once in a while you need to do a sanity check of your code, how it performs and what you can do to improve it. This is most apparent with a code-base that is developed and refactored over a period of several years. There can be several problems that negatively impact performance due to dependency issues or legacy code that should have been removed but was forgotten during a refactoring sprint.
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MySQL optimization and diagnostics tactics
We have all been there. There's that server, which has mysterious spikes in load, which come from nowhere and leave just as they came - quickly and unexplained. While sometimes these problems can be explained with slow queries, given enough time, development and optimization, you will run into scenarios that don't register in the slow query log. It is my opinion, that any kind of database load problem can be traced back to development.
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The Billion Dollar Session Cookie
Marissa Mayer is the VP of geographic and local services at Google. When speaking at the Velocity 2009 conference, she mentioned what was since described as “The Billion Dollar HTML Tag”. The presented problem was that with Google’s vast user base, an inefficiently implemented landing page feature might cost them millions of dollars of lost revenue somewhere down the line. Change in perception is sometimes needed, to recognize something trivial as something you need to pay attention to.
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