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⇱ GCC 16 Produces Faster Binaries Than GCC 15, Competitive Race With LLVM Clang 22 - Phoronix

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GCC 16 Produces Faster Binaries Than GCC 15, Competitive Race With LLVM Clang 22

Written by Michael Larabel in Software on 13 May 2026 at 09:45 AM EDT. Page 6 of 6. 29 Comments.

For Valkey as the popular fork of the open-source Redis code, there was some very nice first place finishes for GCC 16 with some incremental performance gains over GCC 15 on this System76 Thelio Major workstation powered by AMD Zen 5 Threadripper.

Across dozens of benchmarks conducted, it ended up being a very tight race between GCC 16 and Clang 22. It was nice seeing on yet another Linux x86_64 system that GCC 16 continues producing faster binaries overall than GCC 15, while the GCC and Clang open-source compilers continue enjoying very healthy competition between them for Linux x86_64 performance. Similar Linux AArch64 compiler tests are coming soon on Phoronix.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.