Blog Archive
Big O notation
Date: 21 Dec 2009Tags: [ Big-O ] [ PHP ]
Normally you would develop against a test-database. It probably contains about 10 people so you can do your programming and testing.. Once it’s done and QA’d, it will go live and people start to visit the site. After a year or so,.. the site is too slow. Adding more db servers is of no use, your system administrator is spending his holiday inside the my.cnf’s and after dumping a gazzilion GB’s of extra memory to the systems doesn’t help at all… Sounds like it’s the code that’s falling behind.. it cannot cope sorting or handling user lists of 40.000 people, or arrays with more than a million items and even simple validation functions are way to slow.. why? what just happened?