Development
#18
Generate CSS sprite sheets
Group small images (e.g. the website’s interface images) in one larger image called a sprite sheet
This process significantly reduces the number of HTTP requests. There are several free online services for generating sprite sheets (Project Fondue’s CSS Sprite Generator, CSSsprites.com and SpriteMe.org).
Development
#37
Use local variables
When you call a global variable in JavaScript, the interpreter must check that:
- it exists in the current scope, in the scope above, etc.
- the variable has a value
- and more
To avoid all these checks, it is often possible to make useful variables local by transforming them into routine arguments. This process saves CPU time.
