Posts by John Graham-Cumming

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

The oldest trick in the ASCII book

Published on by John Graham-Cumming.

If you're old enough (or interested enough) to have spent a lot of time messing around with the ASCII table then you might have run into a strange fact: it's possible to uppercase ASCII text using just bitwise AND. And it turns out that in some situations this isn't just