Billion Dollar HTML Tag

June 25, 2009 § Leave a comment

Marissa Mayer of Google discusses web site performance at the Velocity 2009 conference.

Mayer found a tag “align=right” table attribute from W3C HTML specs would allow the right-hand table to load before the search results. Being able to show Ad quicker lead to better revenue.

Injecting results delay the rendering produced a drop in searches. Showing 20 or 30 results rather than the default 10 results added 0.4-0.9 secs to the load time.

She explained how Google Checkout “shopping cart” icon next to ads load slower. An image opening another connection can contribute such slower loading. Connections are expensive. Google engineers find a way to draw Google Checkout cart using HTML as it renders faster. HTML & images can affect user impressions of speed.

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