{
  "scope": "1MiB post-write business latency diagnosis;mainperformance report unchanged",
  "parameters": {
    "business_kib": [
      24,
      48,
      96
    ],
    "bursts_mib": [
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    "samples_per_run": 10000,
    "callback_candidates": [
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      32,
      64,
      128,
      256
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    "business_warm_queries": 512,
    "pre_queries": 16,
    "post_queries": 64,
    "group_queries": 16,
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    "selection_rule": "use median-window relative advantages over all burst sizes and runs; among candidates within2%of best score choose most wins, lower run variability, then smaller working set",
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      "cpu": "Apple Silicon (arm64)",
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      "ReaderWriterQueue": "try_enqueue+membercopy",
      "rigtorp": "try_push;noaddedprefetch",
      "atomic_queue": "SPSCtry_push"
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        "messages": 10000000,
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        "variable_payload": true,
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      "CMAKE_BUILD_TYPE": "Release",
      "CMAKE_CXX_COMPILER": "/opt/homebrew/opt/llvm@18/bin/clang++",
      "CMAKE_CXX_FLAGS": "",
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    "original": {
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    "consecutive": {
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    "handoff": {
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    "same_worker": {
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  "limitations": [
    "CPU endpoints cannot detect out-and-back migration",
    "PMU windows are64businessqueries,quantile groups are16queries;different populations",
    "PMU reads perturb microsecond windows;use only for mechanism",
    "fixed instructions/cycles include kernel counter-read boundaries;configurable events user-only",
    "no instruction-PC latency tracing;event-window+assembly+controlled same-code experiment",
    "macOS highQoSdoesnotensurehardaffinity",
    "no_yield improves thisbatchmeans but not everyrunp999;consecutive policydidnotstablyimprove"
  ]
}