--- title: "OpenSSL Performance Still Under Scrutiny" url: https://daily.dev/posts/openssl-performance-still-under-scrutiny-komnc5g0s source_url: https://www.feistyduck.com/newsletter/issue_132_openssl_performance_still_under_scrutiny type: article source: "Feisty Duck" published: 2025-12-30T11:09:46.402Z updated: 2025-12-30T11:10:03.127Z tags: ["security", "performance", "cryptography"] reading_time: 3 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # OpenSSL Performance Still Under Scrutiny **[Feisty Duck](https://daily.dev/sources/feistyduck)** · 3 min read · 0 upvotes · 0 comments ## Summary OpenSSL 3.x introduced significant performance regressions compared to version 1.1.1, causing issues for high-volume deployments. After four years of improvements, OpenSSL 3.5.x has finally reached comparable performance to the older branch. Major Linux distributions like Debian 13, RHEL 10.1, and Ubuntu 26.04 LTS are adopting version 3.5.x for post-quantum cryptography support, making performance improvements critical as post-quantum algorithms already carry performance overhead. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [cryptography — Cryptography 47.0.0.dev1 documentation](https://daily.dev/posts/cryptography-cryptography-47-0-0-dev1-documentation-wy77iqs4s) · Hacker News · 0 upvotes · 0 comments - [Lightship Security and the OpenSSL Corporation Submit OpenSSL 3.5.4 for FIPS 140-3 Validation](https://daily.dev/posts/lightship-security-and-the-openssl-corporation-submit-openssl-3-5-4-for-fips-140-3-validation-bipbok2li) · Security Boulevard · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#performance](https://daily.dev/tags/performance), [#cryptography](https://daily.dev/tags/cryptography) [View this post on daily.dev](https://daily.dev/posts/openssl-performance-still-under-scrutiny-komnc5g0s)