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Rustls Server-Side Performance
In past years, the Rustls project has been happy to receive substantial investments from the ISRG. One of our goals has been to improve performance without compromising on safety. We last posted about our performance improvements in October of 2024, and we're back to talk about another round of improvements. What is Rustls? Rustls is a memory safe TLS implementation with a focus on performance. It is production ready and used in a wide range of applications.
It comes with a C API and FIPS support so that we can bring both memory safety and performance to a broad range of existing programs. This is important because OpenSSL and its derivatives, widely used across the Internet, have a long history of memory safety vulnerabilities with more being found this year. In Rustls 0.23.17, we started using an RwLock instead, which limits contention to the short period when a key rollover happens (by default, every 6 hours).
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