CssText or a separate stylish name?

Question

When we apply many style changes using JavaScript for a single element, phpied and Writing Effective JavaScript (slide 87) suggests:

instead of applying styles one by one using style.stylename, apply everything one at a time using cssText or changing the class name, as this will reduce the number of recalculations / repaints

Which is better if only a single style change?

document.getElementById('myid').style.cssText += ";color:#999;"; 

OR

 document.getElementById('myid').style.color = "#999"; 

jsperf.com/csstext-vs-styles-single shows that when changing only one style, using an individual style name is faster than cssText.

Are there any other factors?

Answer 1

I have to use a separate name in your case, because you are going to change only one style. :)