Contribute to varunkashyapks/Books development by creating an account on GitHub. What every web developer must know about mobile networks, protocols, and APIs provided by browser to deliver the best user experience. Dozens of methods to improve application performance, such as optimizing TCP and TLS. This eloquent book provides what every web developer needs to know about the network, from fundamental limitations that affect performance to major innovations for building even more powerful.
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High Performance Browser Networking This book provides a hands-on overview of what every web developer needs to know about the various. High Performance Browser Networking (O'Reilly).pdf. Title High Performance Browser Networking: What Every Web Developer Should Know about Networking and Web Performance; Author(s) Ilya Grigorik.
I'm sure I still don't get everything, but I learnt a lot and surely will revisit this part. The Binary Framing Layer is explained dead simple yet in enough details to catch the pros and cons. I hope the book gets updated when HTTP2. Book talks about Internet connectivity; fiber speeds and how LTE works. It doesn't go into server-side response time, databases, and so on, since that's highly specific to your stack.
It goes in depth with what's constant between web application. I'd consider this necessary reading for those who are working on web performance, to Most comprehensive overview of web performance I've seen.
I'd consider this necessary reading for those who are working on web performance, to consider the full picture when looking at performance, not just server response time.
Phones will usually turn this off after a few seconds of inactivity think, like a car that turns off its engine when stopped at a light. The cell tower will maintain its TCP sessions, so pushing is effective—however, if you have a polling loop that sends a request just after the interval at which the radio turns off, you've got a terrible, terrible battery-draining software cocktail in play. TCP will go back to slow-start i. If you have a website that's over 15kib how much data you can transfer in the slow-start congestion window , that's bad news for you.
Definitely bad news on a CDN. For 5 stars, I would've liked to have seen more performance studies.
How do performant applications differ? Why is it so important? We know it boosts conversion, but what are other examples?
I was hoping to find a chapter on that in the book, but no dice. I'd also have like to seen a chapter on how to prevent performance regressions. Even better, it also opens up a number of entirely new opportunities to optimize our applications and improve performance! To implement these requirements, there is a large supporting cast of other protocol enhancements, such as new flow control, error handling, and upgrade mechanisms, but these are the most important features that every web developer should understand and leverage in their applications.
As a result, all existing applications can be delivered without modification.
The only observable differences will be improved performance and availability of new capabilities like request prioritization, flow control, and server push. Avoid the need for any changes to content by website authors. Minimize deployment complexity, and avoid changes in network infrastructure. Develop this new protocol in partnership with the open-source community. Gather real performance data to in validate the experimental protocol.
Not long after the initial announcement, Mike Belshe and Roberto Peon, both software engineers at Google, shared their first results, documentation, and source code for the experimental implementation of the new SPDY protocol: So far we have only tested SPDY in lab conditions. Chromium Blog Fast-forward to and the new experimental protocol was supported in Chrome, Firefox, and Opera, and a rapidly growing number of sites, both large for example, Google, Twitter, Facebook and small, were deploying SPDY within their infrastructure.
In effect, SPDY was on track to become a de facto standard through growing industry adoption. Some key features such as multiplexing, header compression, prioritization and protocol negotiation evolved from work done in an earlier open, but non-standard protocol named SPDY.
It also allows prioritization of requests, letting more important requests complete more quickly, further improving performance. This means less competition with other flows, and longer-lived connections, which in turn leads to better utilization of available network capacity. That said, while the high-level API remains the same, it is important to understand how the low-level changes address the performance limitations of the previous protocols.
The "layer" refers to a design choice to introduce a new optimized encoding mechanism between the socket interface and the higher HTTP API exposed to our applications: the HTTP semantics, such as verbs, methods, and headers, are unaffected, but the way they are encoded while in transit is different.
Thankfully, our applications remain blissfully unaware of all these changes, as the client and server perform all the necessary framing work on our behalf. Streams, messages, and frames The introduction of the new binary framing mechanism changes how the data is exchanged between the client and server. Message: A complete sequence of frames that map to a logical request or response message.
The relation of these terms can be summarized as follows: All communication is performed over a single TCP connection that can carry any number of bidirectional streams. Each stream has a unique identifier and optional priority information that is used to carry bidirectional messages.
Each message is a logical HTTP message, such as a request, or response, which consists of one or more frames. The frame is the smallest unit of communication that carries a specific type of data—e. Frames from different streams may be interleaved and then reassembled via the embedded stream identifier in the header of each frame.