Lifeboat blog

When O(N) is better than O(log N)?

We are used to think that O(log N) is always better than O(N), but it is not always true.

PostgreSQL on RAM disk does not worth the trouble

Linux is so good that you do not need to worry about small PostgreSQL database performance at all.

Interview coding skill

Coding on the interviews is an independent skill from real coding.

SVN stash on bash

SVN does not have a stash (or shelve) functionality, but there is always a way around

Setting up Webex on Ubuntu

It is not trivial to set up Webex to work on modern Ubuntu. This post recaps the steps I made to make it work

Java 8 lamdas

Last night I wrote a code using Java 8 lambdas for the first time. And I loved it!

SringBuilder vs StringBuffer revisited

I am sure you have read about StringBuilder being faster than StringBuffer so many times, that you are sick of it already. Fun fact is: it is not faster.

Scala Option performance cost

I wanted to measure how much extra cost does Scala Option incurs.