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Your old Let's Encrypt certificate may slow your Go app down (espe.tech)
1 point by lnsp on Feb 9, 2022 | hide | past | favorite | 1 comment


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.




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