Website code optimisation?

[Cheetah Designs]

Given its the advances in internet speed, do people still optimise their html/css/javascript to take up a minimal amount of space so that it loads faster? Like removing whitespace, tabs, keeping variable names short...

Eg this:

#id{color:#fff}

instead of:

#id
{
   color: #fff;
}

 

[Cheetah Designs]

What about HTML code. Do you take Google's approach and have it practically all on one line or do you split it up and tab it to make it look good?