What Is A Cloudflare Railgun™?

Railgun is a WAN optimization technology that we offer our hosting customers in partnership with a company called CloudFlare.

CloudFlare’s Railgun technology greatly speeds up the delivery of non-cached pages. While CloudFlare automatically caches 65% of the resources needed to make up a page, 35% can't be cached because the resources are dynamically generated or marked as 'do not cache'. That 35% is often the initial HTML of the page that must be downloaded first. CloudFlare Railgun speeds this remaining 35%.

Websites running Railgun show a 143% improvement in HTML load times and a 90% decrease in Time To First Byte (TTFB) responses.

Railgun opens a secure, tunneled connection between the CloudFlare network and your host’s origin server where the connection only sends differences from the last request. This is similar to how video encoding works.

The markup of websites does not change that frequently from one request to the next. Instead of transferring the entire request between CloudFlare and the origin server, Railgun will transfer only the changes in markup from one request to the next. This cuts down on bandwidth, transfer time, and overall page load times. Railgun caches these differences in memory to make page processing as fast as possible.

Any website can benefit from the performance improvements Railgun offers, especially dynamic sites.

We have partnered with CloudFlare to make Railgun both easy and affordable. If you purchase Railgun directly through CloudFlare, it costs $200/month. However, we have partnered with CloudFlare and are offering Railgun to our customers for free.

Please follow our full Cloudflare Guide. 

If you experience issues when enabling Railgun, please contact [email protected]

No. You need to be a CloudFlare customer in order to use Railgun.

If you are using Railgun via cPanel, you can turn it off directly from your control panel. Otherwise, log into your CloudFlare account, go to Performance Settings and turn Railgun off from there. Please file a bug report with a detailed description here.

CloudFlare is a third party service that we offer to our hosting customers. CloudFlare provides performance, security and availability to web properties. CloudFlare runs a globally distributed network where they automatically cache static content, filter malicious traffic and help offload big spikes in traffic. On average, a site loads twice as fast, uses 65% fewer server resources and has an additional layer of security.