We also show that with Mio, McNettle (an SDN controller written in Haskell) can scale effectively to 40+ cores, reach a thoroughput of over 20 million new requests per second on a single machine, and hence become the fastest of all existing SDN controllers.[1]
The new IO Manager in GHC 7.8 improves realistic web server throughput by over 6.5x and expected response time by 5.7x with room to grow.[2]
Form processing has never been better. A library based on Formlets, Digestive Functors enables you to validate and render your forms, including validating straight JSON requests.
<form action="/tweet" method="POST" enctype="application/x-www-form-urlencoded">
<label for="tweet.username">Username: </label>
<input type="text" id="tweet.username" name="tweet.username" value="">
<br>
<label for="tweet.timestamp">Timestamp: </label>
<input type="number" min="0" step="1" pattern="\d+" id="tweet.timestamp" name="tweet.timestamp" value="">
<br>
<label for="tweet.content">Content: </label>
<textarea id="tweet.content" name="tweet.content"></textarea>
<br>
<input value="Submit" type="submit">
</form>
As Snap grows, so will this book. Planned chapters include stream processing with io-streams, Streaming JSON, writing your own Snaplets and a deeper look at the availible database Snaplets.
The book comes with multiple projects filled with executable example code, Designed to make it easier to get up and running faster.