We have recently finished a series of improvements to our services to make it as fast as possible to create webpage screenshots, run a scrape or create a animated GIF etc.
First of all we analysed our hardware and made several changes that has greatly sped up screenshot generation times. The first change was to move to MongoDB using WiredTiger as the database engine, which massively improved our database response times.
Next we migrated to a new data centre, which uses SSD hard drives and dual network connections that are 100 times faster than our previous servers. This meant our customers get much better, more consistent performance even under heavy loads.