{
 "name": "lives stepped on a desktop CPU: the same world, and how fast",
 "registered": "2026-10-05",
 "target": "docs/LIVES.md target 1 (1e9 life-months/s on stated hardware, outputs equal to the monthly engine). protocol-cpu.json (server3) and protocol-cpu-spark.json stay registered and unrun; this is a separate test on different hardware.",
 "engine": "lives_cpu_portable.cpp as committed here (AVX2 first pass; Windows allocation via _aligned_malloc; on Linux it still reproduces the registered GPU run on all 10 seeds), built with clang 23.1.2 -O3 -march=native -fopenmp and the LLVM libomp",
 "hardware": "the owner's Windows desktop: Intel Core i7-14700F (8 performance + 12 efficiency cores, 28 threads), 32 GB. NOT dedicated: a daily-use machine; load and free memory at start and end are reported. Run at BelowNormal priority, 28 threads.",
 "size": "250,000,000 lives, 12 months: a billion lives does not fit in 32 GB. Same size as the met GPU test (protocol-gpu.json).",
 "equivalence": "200,000 lives, 120 months, 10 seeds: every count identical to experiment/lives/gpu/registered-run.txt",
 "decision": "met only if every seed is identical AND throughput at 250,000,000 lives is at least 1e9 life-months per second; published either way",
 "runner": "run-desktop.ps1 as committed here"
}