{
  "kernel": "k04_fmha_prefill",
  "baseline_ms_geomean": 0.115779,
  "optimized_ms_geomean": 0.095409,
  "speedup_geomean": 1.2135,
  "per_case": [
    {"name": "s512",  "baseline_ms": 0.089434, "optimized_ms": 0.084149, "speedup": 1.0628},
    {"name": "s1024", "baseline_ms": 0.100336, "optimized_ms": 0.083655, "speedup": 1.1994},
    {"name": "s2048", "baseline_ms": 0.173183, "optimized_ms": 0.123365, "speedup": 1.4039}
  ],
  "correctness": "PASS"
}