{ "experiment": "MorphIQ Feed Source BLAKE3 checkpoint binding", "measured_date": "2026-10-23", "candidate_revision": "efcb84f03a0001cbb9d86b85c3612bba41b91859", "base_revision": "47470c251a55b00d3eb8e83a66bfd8c7c0d13959", "source_report_path": "docs/evidence/source-blake3-2026-10-23.md", "measurement": "Median of seven per-sample aggregate ns/event values; not per-event latency percentiles", "provenance": { "recorded_at": "2026-10-23T13:00:29Z", "base_commit": "47470c251a55b00d3eb8e83a66bfd8c7c0d13959", "host": "Linux-7.2.10-200.fc44.x86_64-x86_64-with-glibc2.43", "rust": "rustc 1.97.1 (8bab26f4f 2026-07-14)\nbinary: rustc\ncommit-hash: 8bab26f4f68e0e26f0bb7960be334d5b520ea452\ncommit-date: 2026-07-14\nhost: x86_64-unknown-linux-gnu\nrelease: 1.97.1\nLLVM version: 22.1.6\n", "load_before": [ 34.8447265625, 30.328125, 38.7060546875 ], "affinity_cpu": 2, "smt_sibling": 14, "iterations_per_sample": 1000, "events_per_iteration": 1183, "samples_per_algorithm_per_interval": 7, "intervals": [ 1, 64, 1024 ], "hash_inputs": "Candidate uses morphiq-feed/source-prefix/blake3-v1 domain. Same frame bytes, lengths and date; algorithm-tagged version-3 checkpoints. SHA baseline retains original SHA-256 domain/version-2.", "sha_flags": [], "blake3_flags": [], "input_files": { "sessions": { "sha256": "a1f3beee3704d1581d1e954bf3ccbc58766b26a120f500c1455032b2f695d57f", "size": 4096 }, "20261005.writer.lock": { "sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", "size": 0 }, "20261005.0000.mdlog": { "sha256": "e43f17e031e391e10bd9255be2502f2fa0e5bd078d7674d1c841b288f013cfce", "size": 1052672 } }, "scope": "Warm-cache captured OPRA Source microbenchmark; shared heavily loaded host; no strategy or durability qualification.", "binary_sha256": { "sha256": "7c70c3de1ae997eee27b96915443753eab56708f6a2b08e8d6bee0b7fb93537c", "blake3": "15f3ebf426eadf1b5bc51413a46de1c1abde5515569b2435c757b9d529e4aac5" }, "lock_sha256": "d42aad81a44928e2c5ea64da443f2df8e720a89d7a0323595aa1aa243ee38b1d", "crate_versions": { "sha2": "0.11.0", "blake3": "1.8.7" }, "variant": "Review candidate with BLAKE3 transcript and version-3 envelope; not deployed or adopted by Crucible.", "implementation_sha256": { "Cargo.lock": "d42aad81a44928e2c5ea64da443f2df8e720a89d7a0323595aa1aa243ee38b1d", "crates/ferro-feed-source/src/lib.rs": "fe37cc28a3f6f4b138a4ada7f65e55c698fd71eb86465c1f3b3e679768fbeeb7", "crates/ferro-feed-source/src/checkpoint_format.rs": "2c5867d92756a7951549214b115351078276f6c7c403f97b3932a9d19002d162", "crates/ferro-feed-source/src/tests.rs": "6afc7771cb191b159648290f13cdfde430f53a389aaacc3af15cb9863aaedf7b" }, "input_unchanged_after_campaign": true, "baseline_patch_sha256": "be4e719471dfc23be8e5e5604ca3f95af000a7d55425f0f4e666a8b687a4e3f2", "baseline_variant": "Base 47470c2 with retained benchmark-only feature scaffolding and reference-compatible borrows; bench-blake3 feature disabled. See baseline-experiment.patch." }, "summary_ns_per_event": { "1": { "delivery_ns": 436.2425156382079, "resume_ns": 172.4068918005072 }, "64": { "delivery_ns": 227.474775147929, "resume_ns": 171.00144801352494 }, "1024": { "delivery_ns": 224.75456804733727, "resume_ns": 169.88871597633135 } }, "comparison": { "1": { "sha256": { "delivery_ns_per_event": { "median": 867.6796923076923, "min": 863.888371090448, "max": 872.2851648351649 }, "resume_ns_per_event": { "median": 594.4098072696535, "min": 591.8519281487743, "max": 595.6400963651732 }, "process_cpu_ns_per_event_median": 1489.5376162299237, "major_faults": 0 }, "blake3": { "delivery_ns_per_event": { "median": 436.2425156382079, "min": 431.391067624683, "max": 439.6643567202029 }, "resume_ns_per_event": { "median": 172.4068918005072, "min": 170.76028402366865, "max": 174.5939949281488 }, "process_cpu_ns_per_event_median": 635.4488588334744, "major_faults": 0 }, "comparison": { "delivery_ns": { "ratio_of_medians": 1.9889847073669713, 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