Weird bug of the day: Twitter in-app browser can't visit site

Published on by John Graham-Cumming.

We keep a close eye on tweets that mention CloudFlare because sometimes we get early warning about odd errors that we are not seeing ourselves through our monitoring systems. Towards the end of August we saw a small number of tweets like this one: indicating that trying to browse to a CloudFlare customer web site using the Twitter in-app browser was resulting in an error page. Which was…

Kernel bypass

Published on by Marek Majkowski.

In two previous posts we've discussed how to receive 1M UDP packets per second and how to reduce the round trip time. We did the experiments on Linux and the performance was very good considering it's a general purpose operating system. Unfortunately the speed of vanilla Linux kernel networking is not sufficient for more specialized workloads. For example, here at CloudFlare, we are constantly dealing with large packet…

Test all the things: IPv6, HTTP/2, SHA-2

Published on by John Graham-Cumming.

CloudFlare constantly tries to stay on the leading edge of Internet technologies so that our customers' web sites use the latest, fastest, most secure protocols. For example, in the past we've enabled IPv6 and SPDY/3.1. Today we've switched on a test server that is open for people to test compatibility of web clients. It's a mirror of this blog and is served from https://http2.cloudflare.…

Simple Helix chooses CloudFlare to ignite white-hot Magento performance

Published on by Peter Dumanian.

Today’s guest blogger is George Cagle. George is a system administrator at Simple Helix, a CloudFlare partner. Some months ago, we made a big bet on partnering with CloudFlare for performance improvements and website security for our Magento hosting customers. Customer experience is core to our business and relying on another company is a major deal. CloudFlare is now included in Default–On mode for select Simple…

Railgun v5 has landed: better, faster, lighter

Published on by John Graham-Cumming.

Three years ago we launched Railgun, CloudFlare's origin network optimizer. Railgun allows us to cache the uncacheable to accelerate the connection between CloudFlare and our customers' origin servers. That brings the benefit of a CDN to even dynamic content with no need for 'fast purging' or other tricks. With Railgun even dynamic, ever-changing pages benefit from caching. CC BY 2.0 image by Nathan E Photography Over those…