GoKawiilKernel build times drop to 15 seconds on new Linux patches
Phoronix's Michael Larabel reports that a clean x86-64 defconfig Linux kernel build now takes about 15 seconds on his dual AMD EPYC 9575F workstation, down from over 22 seconds before recent Kbuild patches. The speedup stems from work by Linux memory-management developer Lorenzo Stoakes, who used AI/LLM assistance to remove compilation bottlenecks, alongside continued hardware gains.
GoKawiil's interpretation of the reporting above, not reported fact.
Kernel compile time has long served as an informal benchmark for both hardware progress and kernel code efficiency, so a jump this large signals real gains beyond just faster chips. Larabel's framing that 'the coffee window is closing' suggests routine kernel builds could soon be near-instant even on less extreme hardware, though his test used a 128-core, 256-thread server far beyond typical consumer machines. The use of AI assistance in optimizing core kernel build infrastructure could also point to a broader trend of AI-assisted contributions to low-level open-source development.
- A defconfig x86-64 Linux kernel build reportedly compiles in about 15 seconds on Larabel's dual EPYC 9575F system, down from over 22 seconds.
- The speedup comes from Kbuild patches by developer Lorenzo Stoakes, developed with AI/LLM assistance.
- Ordinary consumer PCs will likely still take noticeably longer, since the benchmark system uses 128 cores, 256 threads, and high-end DDR5 memory.
AMD Ryzen 9 7950X Processor — If you're chasing blistering kernel compile times, a high-core-count CPU like the Ryzen 9 7950X is exactly the kind of hardware that makes those sub-15-second builds possible. Its many threads are perfect for parallelized workloads like Kbuild, letting Linux enthusiasts push compile times to the edge of what's currently achievable. A great upgrade for anyone tinkering with kernel builds at home.
See AMD Ryzen 9 7950X Processor on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: tomshardware.com — Mark Tyson, 2026-09-27
Published there as: “Linux enthusiasts see 10-second kernel compilation times on the horizon”
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