{
  "note": "Alternating three quiet executions of the baseline Release microbenchmark and final native zero-count teardown Release microbenchmark, each containing three internal passes. Native runtime source is unchanged by the subsequent WASI accounting fix. Baseline is commit 2eb32e25. Host libraries are shared by both binaries. ns_per_op is the rounded value printed by the benchmark; ns_total/iters retains finer precision.",
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  ],
  "attribution": {
    "note": "Deterministic runtime counters (Debug.runtime_counter, DREAM_BENCH_COUNTERS=1) per measured pass of tests/bench/microbenches.dream, before the region and collector changes. Timings were too noisy on a loaded host to attribute; counts are exact. binary_trees builds 100 depth-12 trees (409,500 nodes).",
    "per_node_binary_trees": {
      "cycle_node_registrations": 1,
      "cycle_node_removals": 1,
      "queued_candidates": 1,
      "registry_lookups": 11,
      "gate_acquisitions": 8,
      "trial_collections": 0,
      "forward_flag_queues": 0
    },
    "per_node_weak_tree": {
      "cycle_node_registrations": 1,
      "queued_candidates": 2,
      "registry_lookups": 23,
      "gate_acquisitions": 16,
      "trial_collections": 1,
      "edges_visited": 2,
      "forward_flag_queues": 1,
      "weak_registrations": 1,
      "weak_invalidations": 1
    },
    "mir_difference": "The reference build wraps the make_tree(12) call in region_enter/region_leave (unique-region) and nulls the result; the current build omits the region because unique_region refuses every cycle-capable New, so each node takes the collector path. No other MIR pass output differs for the tree builder.",
    "ir_per_node_calls": [
      "dream_set_type (gate + calloc CycleNode + HASH_ADD)",
      "2x dream_cycle_store_begin per constructor (gate + check_store re-entering the gate with 2 lookups, then 2 more lookups)",
      "dream_cycle_release (gate + lookup + calloc Candidate + drain)",
      "dream_cycle_forget in dream_recycle_slow (gate + lookup + HASH_DEL)"
    ],
    "forward_edge_flag": "Plain trees never set may_have_forward_edges: children are allocated before parents, so every store is backward. weak_tree allocates the parent first, so the first child store is a forward edge; the global flag then queues every nonzero decrement for trial deletion until the cycle registry empties (one trial collection per node). An unrelated live List<object> did not change the plain tree counts.",
    "isolation": {
      "binary_trees_counts_isolated_equal_suite": true
    }
  }
}