{
  "business_kib": [
    24,
    48,
    96
  ],
  "bursts_mib": [
    1,
    2,
    4,
    8,
    16
  ],
  "runs": 3,
  "selection_repeats": 8,
  "samples_per_run": 10000,
  "callback_candidates": [
    16,
    32,
    64,
    128,
    256
  ],
  "process_timeout": 900,
  "fixed_callback_iterations": 0,
  "selected_business_kib": 48,
  "callback_iterations": 64,
  "final_window_repeats": 2500,
  "writer_pool_total_bytes": 16384,
  "reader_pool_total_bytes": 268435456,
  "native_slot_storage_bytes": 268435456,
  "payload_bytes": 32,
  "business_accesses": 8,
  "business_warm_queries": 512,
  "pre_queries": 16,
  "post_queries": 64,
  "group_queries": 16,
  "quantiles": "perrunnearest-rank,then3runarithmeticmean",
  "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",
  "machine": {
    "cpu": "Apple Silicon (arm64)",
    "os": "macOS-14.4.1-arm64-arm-64bit",
    "producer_qos": "user_interactive",
    "hard_affinity": false
  },
  "regular_apis": {
    "ReaderWriterQueue": "try_enqueue+membercopy",
    "rigtorp": "try_push;noaddedprefetch",
    "atomic_queue": "SPSCtry_push"
  },
  "producer_qos": "user_interactive on macOS",
  "producer_cpu": -1,
  "publish_count": 4294967295,
  "scan_current": false,
  "queue_parameters": {
    "baseline": {
      "transport": "two_buf_queue",
      "mode": "throughput",
      "payload_bytes": 32,
      "messages": 10000000,
      "warmup_messages": 0,
      "callback_iterations": 64,
      "verify_payload": true,
      "prepared_input": false,
      "variable_payload": true,
      "prepared_input_limit_bytes": 268435456,
      "measure_callback_time": false,
      "producer_interval_ns": 0,
      "source_block_size": 4096,
      "source_pool_min": 4,
      "source_pool_max": 4,
      "source_queue_capacity": 16,
      "writer_backpressure": "drop",
      "writer_spin_count": 1000,
      "writer_wait_timeout_ms": 5000,
      "output_block_size": 4096,
      "output_frame_capacity": 4,
      "output_pool_min": 65536,
      "output_pool_max": 65536,
      "output_queue_capacity": 65538,
      "cancel_claim_mode": "tail",
      "output_mode": "spsc",
      "output_reader_mode": "wait_signal",
      "output_reader_count": 1,
      "output_retry_wait_us": 1000,
      "output_enable_stats": false,
      "is_scan_current": false,
      "reader_spin_count": 1000,
      "rescan_interval_ns": 1000000,
      "rescan_max_interval_ns": 1000000,
      "consumer_cpu": -1,
      "producer_cpu": -1,
      "producer_qos": "user_interactive",
      "round_storage_bytes": 214748320,
      "fixed_round_boundaries": true,
      "spsc_buffer_bytes": 268435456,
      "prefault_producer_buffers": true,
      "finish_timeout_ms": 120000,
      "work_wait_min_ms": 1,
      "finish_retry_ms": 1,
      "publish_count": 4294967295,
      "use_write_session": false,
      "rigtorp_write_prefetch": true,
      "readerwriterqueue_copy_after_zero": false,
      "spsc_capacity": 0,
      "retry_yield_every": 1024,
      "spsc_idle_spins": 1000,
      "spsc_idle_sleep_ns": 0,
      "timer": "auto",
      "sample_every": 256,
      "max_samples": 100000,
      "latency_batch_size": 1000,
      "timer_calibration_samples": 16384,
      "call_batch_size": 256,
      "random_seed": 42,
      "timeout_seconds": 900,
      "buffer_budget_bytes": 536870912
    },
    "TwoBufQueue": {
      "transport": "two_buf_queue",
      "mode": "throughput",
      "payload_bytes": 32,
      "messages": 10000000,
      "warmup_messages": 0,
      "callback_iterations": 64,
      "verify_payload": true,
      "prepared_input": false,
      "variable_payload": true,
      "prepared_input_limit_bytes": 268435456,
      "measure_callback_time": false,
      "producer_interval_ns": 0,
      "source_block_size": 4096,
      "source_pool_min": 4,
      "source_pool_max": 4,
      "source_queue_capacity": 16,
      "writer_backpressure": "drop",
      "writer_spin_count": 1000,
      "writer_wait_timeout_ms": 5000,
      "output_block_size": 4096,
      "output_frame_capacity": 4,
      "output_pool_min": 65536,
      "output_pool_max": 65536,
      "output_queue_capacity": 65538,
      "cancel_claim_mode": "tail",
      "output_mode": "spsc",
      "output_reader_mode": "wait_signal",
      "output_reader_count": 1,
      "output_retry_wait_us": 1000,
      "output_enable_stats": false,
      "is_scan_current": false,
      "reader_spin_count": 1000,
      "rescan_interval_ns": 1000000,
      "rescan_max_interval_ns": 1000000,
      "consumer_cpu": -1,
      "producer_cpu": -1,
      "producer_qos": "user_interactive",
      "round_storage_bytes": 214748320,
      "fixed_round_boundaries": true,
      "spsc_buffer_bytes": 268435456,
      "prefault_producer_buffers": true,
      "finish_timeout_ms": 120000,
      "work_wait_min_ms": 1,
      "finish_retry_ms": 1,
      "publish_count": 4294967295,
      "use_write_session": false,
      "rigtorp_write_prefetch": true,
      "readerwriterqueue_copy_after_zero": false,
      "spsc_capacity": 0,
      "retry_yield_every": 1024,
      "spsc_idle_spins": 1000,
      "spsc_idle_sleep_ns": 0,
      "timer": "auto",
      "sample_every": 256,
      "max_samples": 100000,
      "latency_batch_size": 1000,
      "timer_calibration_samples": 16384,
      "call_batch_size": 256,
      "random_seed": 42,
      "timeout_seconds": 900,
      "buffer_budget_bytes": 536870912
    },
    "ReaderWriterQueue": {
      "transport": "readerwriterqueue",
      "mode": "throughput",
      "payload_bytes": 32,
      "messages": 10000000,
      "warmup_messages": 0,
      "callback_iterations": 64,
      "verify_payload": true,
      "prepared_input": false,
      "variable_payload": true,
      "prepared_input_limit_bytes": 268435456,
      "measure_callback_time": false,
      "producer_interval_ns": 0,
      "source_block_size": 4096,
      "source_pool_min": 4,
      "source_pool_max": 4,
      "source_queue_capacity": 16,
      "writer_backpressure": "drop",
      "writer_spin_count": 1000,
      "writer_wait_timeout_ms": 5000,
      "output_block_size": 4096,
      "output_frame_capacity": 4,
      "output_pool_min": 65536,
      "output_pool_max": 65536,
      "output_queue_capacity": 65538,
      "cancel_claim_mode": "tail",
      "output_mode": "spsc",
      "output_reader_mode": "wait_signal",
      "output_reader_count": 1,
      "output_retry_wait_us": 1000,
      "output_enable_stats": false,
      "is_scan_current": false,
      "reader_spin_count": 1000,
      "rescan_interval_ns": 1000000,
      "rescan_max_interval_ns": 1000000,
      "consumer_cpu": -1,
      "producer_cpu": -1,
      "producer_qos": "user_interactive",
      "round_storage_bytes": 214748320,
      "fixed_round_boundaries": true,
      "spsc_buffer_bytes": 268435456,
      "prefault_producer_buffers": true,
      "finish_timeout_ms": 120000,
      "work_wait_min_ms": 1,
      "finish_retry_ms": 1,
      "publish_count": 4294967295,
      "use_write_session": false,
      "rigtorp_write_prefetch": true,
      "readerwriterqueue_copy_after_zero": false,
      "spsc_capacity": 8371713,
      "retry_yield_every": 1024,
      "spsc_idle_spins": 0,
      "spsc_idle_sleep_ns": 12500,
      "timer": "auto",
      "sample_every": 256,
      "max_samples": 100000,
      "latency_batch_size": 1000,
      "timer_calibration_samples": 16384,
      "call_batch_size": 256,
      "random_seed": 42,
      "timeout_seconds": 900,
      "buffer_budget_bytes": 536870912
    },
    "rigtorp": {
      "transport": "rigtorp",
      "mode": "throughput",
      "payload_bytes": 32,
      "messages": 10000000,
      "warmup_messages": 0,
      "callback_iterations": 64,
      "verify_payload": true,
      "prepared_input": false,
      "variable_payload": true,
      "prepared_input_limit_bytes": 268435456,
      "measure_callback_time": false,
      "producer_interval_ns": 0,
      "source_block_size": 4096,
      "source_pool_min": 4,
      "source_pool_max": 4,
      "source_queue_capacity": 16,
      "writer_backpressure": "drop",
      "writer_spin_count": 1000,
      "writer_wait_timeout_ms": 5000,
      "output_block_size": 4096,
      "output_frame_capacity": 4,
      "output_pool_min": 65536,
      "output_pool_max": 65536,
      "output_queue_capacity": 65538,
      "cancel_claim_mode": "tail",
      "output_mode": "spsc",
      "output_reader_mode": "wait_signal",
      "output_reader_count": 1,
      "output_retry_wait_us": 1000,
      "output_enable_stats": false,
      "is_scan_current": false,
      "reader_spin_count": 1000,
      "rescan_interval_ns": 1000000,
      "rescan_max_interval_ns": 1000000,
      "consumer_cpu": -1,
      "producer_cpu": -1,
      "producer_qos": "user_interactive",
      "round_storage_bytes": 214748320,
      "fixed_round_boundaries": true,
      "spsc_buffer_bytes": 268435456,
      "prefault_producer_buffers": true,
      "finish_timeout_ms": 120000,
      "work_wait_min_ms": 1,
      "finish_retry_ms": 1,
      "publish_count": 4294967295,
      "use_write_session": false,
      "rigtorp_write_prefetch": false,
      "readerwriterqueue_copy_after_zero": false,
      "spsc_capacity": 8388603,
      "retry_yield_every": 1024,
      "spsc_idle_spins": 4000,
      "spsc_idle_sleep_ns": 1000,
      "timer": "auto",
      "sample_every": 256,
      "max_samples": 100000,
      "latency_batch_size": 1000,
      "timer_calibration_samples": 16384,
      "call_batch_size": 256,
      "random_seed": 42,
      "timeout_seconds": 900,
      "buffer_budget_bytes": 536870912
    },
    "atomic_queue": {
      "transport": "atomic_queue",
      "mode": "throughput",
      "payload_bytes": 32,
      "messages": 10000000,
      "warmup_messages": 0,
      "callback_iterations": 64,
      "verify_payload": true,
      "prepared_input": false,
      "variable_payload": true,
      "prepared_input_limit_bytes": 268435456,
      "measure_callback_time": false,
      "producer_interval_ns": 0,
      "source_block_size": 4096,
      "source_pool_min": 4,
      "source_pool_max": 4,
      "source_queue_capacity": 16,
      "writer_backpressure": "drop",
      "writer_spin_count": 1000,
      "writer_wait_timeout_ms": 5000,
      "output_block_size": 4096,
      "output_frame_capacity": 4,
      "output_pool_min": 65536,
      "output_pool_max": 65536,
      "output_queue_capacity": 65538,
      "cancel_claim_mode": "tail",
      "output_mode": "spsc",
      "output_reader_mode": "wait_signal",
      "output_reader_count": 1,
      "output_retry_wait_us": 1000,
      "output_enable_stats": false,
      "is_scan_current": false,
      "reader_spin_count": 1000,
      "rescan_interval_ns": 1000000,
      "rescan_max_interval_ns": 1000000,
      "consumer_cpu": -1,
      "producer_cpu": -1,
      "producer_qos": "user_interactive",
      "round_storage_bytes": 214748320,
      "fixed_round_boundaries": true,
      "spsc_buffer_bytes": 268435456,
      "prefault_producer_buffers": true,
      "finish_timeout_ms": 120000,
      "work_wait_min_ms": 1,
      "finish_retry_ms": 1,
      "publish_count": 4294967295,
      "use_write_session": false,
      "rigtorp_write_prefetch": true,
      "readerwriterqueue_copy_after_zero": false,
      "spsc_capacity": 8388608,
      "retry_yield_every": 1024,
      "spsc_idle_spins": 2000,
      "spsc_idle_sleep_ns": 10000,
      "timer": "auto",
      "sample_every": 256,
      "max_samples": 100000,
      "latency_batch_size": 1000,
      "timer_calibration_samples": 16384,
      "call_batch_size": 256,
      "random_seed": 42,
      "timeout_seconds": 900,
      "buffer_budget_bytes": 536870912
    }
  },
  "build": {
    "BRQ_ENABLE_POOL_DEPTH_STATS": "OFF",
    "CMAKE_BUILD_TYPE": "Release",
    "CMAKE_CXX_COMPILER": "/opt/homebrew/opt/llvm@18/bin/clang++",
    "CMAKE_CXX_FLAGS": "",
    "CMAKE_CXX_FLAGS_RELEASE": "-O3 -DNDEBUG",
    "CMAKE_CXX_COMPILER_ID": "Clang",
    "CMAKE_CXX_COMPILER_VERSION": "18.1.8"
  },
  "benchmark_parameters": {
    "source_pool_bytes": 16384,
    "business_accesses": 8,
    "warm_queries": 512,
    "query_group": 16,
    "query_groups": 4,
    "target_percent": 80,
    "setup_timeout_ms": 3000,
    "prefill": true
  }
}