Does margin-left:2px; render faster than margin:0 0 0 2px;?



Category : Web Design

Douglas Crockford describes the consequence of Javascript inquiring a node's style. How simply asking for the margin of a div causes the browser to 'reflow' the div in the browser's rendering engine four times.


So that made me wonder, during the initial rendering of a page (or in Crockford's jargon a "web scroll") is it faster to write CSS that defines only the non-zero/non-default values? To provide an example:


div{
margin-left:2px;
}


Than


div{
margin:0 0 0 2px;
}


I know consequence of this 'savings' is insignificant, b


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