Your old Let's Encrypt certificate may slow your Go app down(blog.espe.tech)
blog.espe.tech
Your old Let's Encrypt certificate may slow your Go app down
https://blog.espe.tech/posts/letsencrypt-may-slow-you-down/
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TLDR: Your Let's Encrypt certificate may have an RSA private key. Go's TLS implementation is far better optimized for ECDSA keys. Switching from RSA to ECDSA saves about 95% of CPU cycles due to the better implementation.