leonarski_fandClaude Opus 5
b47bce7c3b
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The Linux jobs already pass -march=x86-64-v3; the MSVC viewer job passed nothing, so it built at the x64 baseline. MSVC has no spelling for the x86-64-v2 level, but /arch:AVX is the nearest and implies SSE4.1/4.2 - which is the part that matters, because below SSE4.1 Eigen has no vectorised round and falls back to one libm call per element. AVX is Sandy Bridge and up, a safe floor for a desktop viewer. The architecture flags stay OUT of CMakeLists on purpose, so a site can build x86-64-v4 on an AVX-512 cluster, or -march=native, or the plain baseline. That is easy to mistake for an oversight and "fix", so say it in CLAUDE.md - together with the consequence that catches anyone profiling: a default local Release build is not what CI or production runs, and the gap is not uniform. GPU-bound work is unaffected, but the CPU and Eigen bound phases - first-pass indexing and scaling/merging - measure about 26% slower without the flags. That is enough to make rounding look like a tenth of all cycles when a real build has it nearly free, and to send a reader at the wrong code. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Jungfraujoch
Application to receive data from the PSI JUNGFRAU and EIGER detectors.
All documentation is now placed in docs/ subdirectory and for the current version hosted on Jungfraujoch Read The Docs page.