Unlocking the Power of TLSv1.3: Early Data (0-RTT) and its Impact on Web Performance
It’s been a long time since we first explored the realm of TLSv1.3, and I’m excited to share our latest findings with you. With the recent release of LNMP 1.6 beta, we’ve made significant strides in simplifying and stabilizing the process of enabling TLSv1.3 support on our Virtual Private Servers (VPS). Last night, we successfully upgraded our own LNMP 1.5 to LNMP 1.6 Beta, and the results are impressive.
The Speed of TLSv1.3: Where Does it Shine?
Many of you may have heard that TLSv1.3 is faster than its predecessors, but what exactly does that mean? To understand this, let’s delve into the world of web performance and the indicators that matter.
Propagation Delay: The Key to Smooth Page Loads
Propagation delay, or transmission latency, is a critical factor in determining the speed of your website. It’s the time it takes for data to travel from your server to the user’s browser. A lower propagation delay means a smoother and faster page load experience.
The Four Steps to Establishing a Full HTTPS Connection
To establish a secure connection between your browser and server, the following steps are taken:
- DNS Queries: Your browser converts the domain name into an IP address, which is usually provided by your Internet Service Provider (ISP). This step is often cached, resulting in minimal delay.
- TCP Handshake (1 RTT): The client sends a SYN packet to the server, which responds with an ACK packet. This exchange takes one round-trip time (1 RTT).
- TLS Handshake (2 RTT): The client and server exchange keys, and set up link encryption for TLS 1.2 or earlier versions. This step requires two RTT.
- Establishing an HTTP Connection (1 RTT): Once the TLS connection is established, the browser sends encrypted HTTP requests over the connection.
The Benefits of TLSv1.3: Early Data (0-RTT)
TLSv1.3 offers several advantages over its predecessors, including:
- Faster Connection Establishment: TLSv1.3 requires only one RTT to complete the TLS negotiation, whereas TLSv1.2 requires two RTT.
- Reduced Latency: With TLSv1.3, repeated connections can be established in 0 RTT, reducing latency and improving web performance.
Deploying TLSv1.3 with LNMP 1.6 Beta
If you’re using LNMP, you can refer to our guide on “Starting with LNMP 1.6 Beta Support for TLSv1.3 Early Data” to update your deployment environment and experience the benefits of TLSv1.3. However, please note that if your site is enabled with CDN acceleration, you’ll need to configure the CDN to support TLSv1.3.
Supported Blogs and CDNs
Several blogs and CDNs have already enabled TLSv1.3 support, including:
- Operation and Maintenance Study Notes Blog (www.imydl.tech)
- Moon CASTLE Hexo Blog (hexo.imydl.tech)
- Typecho Dynamic Blog
Conclusion
In conclusion, TLSv1.3 offers several advantages over its predecessors, including faster connection establishment and reduced latency. With the recent release of LNMP 1.6 beta, enabling TLSv1.3 support on your VPS has become simpler and more stable. We encourage you to explore the benefits of TLSv1.3 and upgrade your deployment environment to experience the improvements in web performance.