A curated list of materials about Big O notation.
## Lecture Notes
- Algorithms: Design and Analysis, Part 1, Week 1: Asymptotic Analysis on Coursera by Tim Roughgarden
- [Scala Collections] (http://docs.scala-lang.org/overviews/collections/performance-characteristics.html)
- [Python Collections] (https://wiki.python.org/moin/TimeComplexity)
- [List of Big-O for PHP functions] (http://stackoverflow.com/a/2484455/472433)