October 2010
Intermediate to advanced
456 pages
10h 16m
English
Content preview from ASP.NET Site Performance SecretsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Parallel loading
The browser loads images and CSS and JavaScript files in parallel to reduce the overall page load time. However, the specification of the HTTP 1.1 protocol that governs communication between the browser and the server suggests that browsers download not more than two components in parallel per domain. That made sense back in 1997 when HTTP 1.1 was introduced, and most people still used low bandwidth dial up connections. With broadband connections used by most people these days, you'll want to increase the number of components loaded in parallel.
To visualize this, have a look at this highly simplified Waterfall chart of a web page with eight components, all loaded from the single domain:
In the Serving images from cookieless domains ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.