Discover how Rustls, the Rust-based TLS library, delivers 2x lower latency than OpenSSL in server benchmarks. Learn why enterprises are adopting this memory-safe, scalable solution for high-performance encryption.
Why Rustls is Gaining Traction in Enterprise Security
In the competitive landscape of TLS/SSL encryption, performance and security are non-negotiable. Rustls, a memory-safe TLS library written in Rust, has emerged as a high-performance alternative to OpenSSL, particularly in server-side deployments.
Recent benchmarks reveal that Rustls not only competes with OpenSSL but outperforms it in key metrics—especially in multi-core scalability and handshake latency.
Key Performance Advantages of Rustls
2x lower TLS handshake latency compared to OpenSSL
Near-linear scaling with additional CPU cores
Memory-safe design, reducing vulnerabilities like buffer overflows
Optimized for modern server workloads (cloud, microservices, edge computing)
"Rustls servers scale almost linearly with the number of cores available, and server latency for the core TLS handshake handling is roughly 2x lower than OpenSSL in our benchmarks." — MemorySafety.org
Benchmark Breakdown: Rustls vs. OpenSSL
1. Multi-Core Efficiency
Rustls leverages Rust’s fearless concurrency, enabling near-perfect scaling across CPU cores. This makes it ideal for:
High-traffic web servers
Cloud-native applications
Financial services requiring low-latency encryption
2. Handshake Speed
In tests, Rustls completed TLS handshakes twice as fast as OpenSSL. For enterprises, this translates to:
Faster page loads (critical for eCommerce & ad tech)
Reduced server costs (lower CPU usage per connection)
3. Security Advantages
Unlike OpenSSL, Rustls eliminates entire classes of vulnerabilities due to:
No unsafe C code (common in OpenSSL exploits)
Compiler-enforced memory safety
Who Should Consider Rustls?
DevOps teams optimizing Kubernetes & cloud workloads
Cybersecurity professionals prioritizing zero-trust architectures
Fintech & healthcare sectors needing FIPS-compliant solutions
FAQs: Rustls vs. OpenSSL
Q: Is Rustls compatible with existing OpenSSL integrations?
A: Yes, via rustls-ffi bindings for drop-in replacement.
Q: Does Rustls support legacy protocols like TLS 1.2?
A: It supports TLS 1.2 and 1.3 but disables insecure cipher suites by default.
Q: How does Rustls impact server costs?
A: Its efficiency reduces AWS/GCP compute expenses by up to 15% in high-traffic scenarios.
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