{ "format": "shadowfrag.current-netcode-evidence", "version": 1, "completedAt": "2026-10-27T02:13:57.113347+00:00", "runtime": { "wireProtocol": 37, "backend": "PicoQUIC", "congestionControl": "CUBIC", "alternative": "Quiche/CUBIC", "simulationHz": 128, "sceneHz": 64, "shippingPlayerCap": 64 }, "scope": "Synthetic real-protocol FFA clients across two wired-gigabit hosts. Linux Ryzen 7 5800H client generator; Windows i5-12500H server. Rendering, audio and full server-bot AI are measured separately.", "confirmedWorkloads": [ { "players": 64, "map": "industrial", "objective": "ffa", "equipment": "stars", "bandwidth_bytes_per_second_per_client": 256000, "workers": 8, "confirmation_campaign": "lan-confirm-baseline", "repeats": 3, "longest_active_seconds": 300, "decision": "Retain general shipping reference" }, { "players": 128, "map": "shogun-highlands", "objective": "ffa", "equipment": "fixed mixed weapon cohorts, net, shadow and chi enabled", "bandwidth_bytes_per_second_per_client": 256000, "workers": 4, "confirmation_campaign": "lan-confirm-large128-clean-repeat", "repeats": 3, "longest_active_seconds": 300, "decision": "Conditional spread-out LAN research envelope; do not raise shipping cap" } ], "failedCandidates": [ { "players": 80, "map": "industrial", "reason": "Clean repeat needed two input-buffer handoffs. Other sustained repeats were contended; short shielded volleys are not sustained confirmation." }, { "players": 160, "map": "shogun-highlands", "reason": "Two clean passes; one clean repeat had two input-buffer handoffs." }, { "players": 128, "map": "industrial", "bandwidth_bytes_per_second_per_client": 512000, "reason": "Feedback and position-age failure in one seed; sustained generator-cycle and handoff failure." }, { "players": 192, "map": "large-map fixtures", "reason": "Load generator missed the 7.8125 ms input interval; cannot infer a server ceiling." } ], "researchBinaryCap": 192, "confirmations": [ { "case": "industrial-stars-64-seed-826701-eight-workers", "evidence": "lan-confirm-baseline/industrial-stars-64-seed-826701-eight-workers/attempt-001", "map": "industrial", "players": 64, "seed": 826701, "seconds": 40.0040923, "complete": true, "environmentClean": true, "passesScreen": true, "reasons": [], "serverTickP99Ms": 1.2, "serverTickP999Ms": 1.5, "positionAgeP99Ms": 16.383, 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"seconds": 40.0097322, "complete": true, "environmentClean": true, "passesScreen": true, "reasons": [], "serverTickP99Ms": 2.3, "serverTickP999Ms": 2.7, "positionAgeP99Ms": 27.775, "actionFeedbackP99Ms": 29.22879, "inputBufferHandoffs": 0, "lateInputs": 402, "lateActions": 5, "clientFailures": [], "generatorGapP999Ms": 6.751 }, { "case": "industrial-stars-128-wide-soak-four-workers", "evidence": "lan-confirm-wide4/industrial-stars-128-wide-soak-four-workers/attempt-001", "map": "industrial", "players": 128, "seed": 826703, "seconds": 310.0010323, "complete": true, "environmentClean": true, "passesScreen": false, "reasons": [ "generator_gap_p999: 7.839", "client_rebases: 2" ], "serverTickP99Ms": 2.2, "serverTickP999Ms": 2.55, "positionAgeP99Ms": 27.775, "actionFeedbackP99Ms": 27.903, "inputBufferHandoffs": 2, "lateInputs": 11603, "lateActions": 179, "clientFailures": [], "generatorGapP999Ms": 7.839 } ], "criteria": { "tick_p99_max_ms": 5.5, "tick_p999_max_ms": 7.8125, "scene_worst_p99_max_ms": 50, "feedback_worst_p99_max_ms": 50, "generator_gap_p999_max_ms": 7.8125, "zero_required": [ "client_rebases", "client_invalid", "hitch_failures", "state_overflows" ], "empty_required": [ "client_failures" ], "full_acquisition_required": true }, "percentile": "Each scene-age or action-feedback value is the maximum of individual clients’ p99 values, not a pooled percentile. Feedback measures weapon requests, excluding projectile flight time.", "encounters": [ { "feature": "bow", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost/industrial-bow-idle/attempt-001", "seconds": 70.0072613, "serverUploadMbps": 73.99359696634811, "serverDownloadMbps": 14.91022848440594 }, "active": { "evidence": "lan-cost/industrial-bow-active/attempt-001", "seconds": 70.0097618, "serverUploadMbps": 81.93628454873027, "serverDownloadMbps": 16.805061509335516 }, "difference": { "serverUploadMbps": 7.942687582382163, "serverDownloadMbps": 1.8948330249295768 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "chi", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/industrial-chi-idle/attempt-001", "seconds": 70.0065147, "serverUploadMbps": 73.87445329329037, "serverDownloadMbps": 14.914796039176839 }, "active": { "evidence": "lan-cost-resumed/industrial-chi-active/attempt-001", "seconds": 70.0040055, "serverUploadMbps": 81.24970689244915, "serverDownloadMbps": 15.863811142946465 }, "difference": { "serverUploadMbps": 7.375253599158782, "serverDownloadMbps": 0.9490151037696268 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "grenade", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost/industrial-grenade-idle/attempt-001", "seconds": 70.0040946, "serverUploadMbps": 73.90426874873091, "serverDownloadMbps": 14.94381844681109 }, "active": { "evidence": "lan-cost/industrial-grenade-active/attempt-001", "seconds": 70.007779, "serverUploadMbps": 83.67972304882022, "serverDownloadMbps": 16.69589660497515 }, "difference": { "serverUploadMbps": 9.775454300089308, "serverDownloadMbps": 1.7520781581640605 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "melee", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost/industrial-melee-idle/attempt-001", "seconds": 70.0004, "serverUploadMbps": 73.96176373209971, "serverDownloadMbps": 14.92038965776923 }, "active": { "evidence": "lan-cost/industrial-melee-active/attempt-001", "seconds": 70.0079536, "serverUploadMbps": 85.75669622378464, "serverDownloadMbps": 15.471677454272639 }, "difference": { "serverUploadMbps": 11.794932491684932, "serverDownloadMbps": 0.5512877965034093 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "net", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost/industrial-net-idle/attempt-001", "seconds": 70.0039549, "serverUploadMbps": 73.94662367767062, "serverDownloadMbps": 14.946988721810763 }, "active": { "evidence": "lan-cost/industrial-net-active/attempt-001", "seconds": 70.0001773, "serverUploadMbps": 74.71249018503825, "serverDownloadMbps": 15.05925384624456 }, "difference": { "serverUploadMbps": 0.7658665073676332, "serverDownloadMbps": 0.11226512443379733 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "rail", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost/industrial-rail-idle/attempt-001", "seconds": 70.00347, "serverUploadMbps": 73.9856662057316, "serverDownloadMbps": 14.943907408225076 }, "active": { "evidence": "lan-cost/industrial-rail-active/attempt-001", "seconds": 70.0045601, "serverUploadMbps": 86.82623760438996, "serverDownloadMbps": 15.457561875014601 }, "difference": { "serverUploadMbps": 12.840571398658355, "serverDownloadMbps": 0.5136544667895251 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "shadow", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/industrial-shadow-idle/attempt-001", "seconds": 70.0012983, "serverUploadMbps": 73.9315633331677, "serverDownloadMbps": 14.915458162711461 }, "active": { "evidence": "lan-cost-resumed/industrial-shadow-active/attempt-001", "seconds": 70.0019661, "serverUploadMbps": 76.67338450311124, "serverDownloadMbps": 15.34727259862328 }, "difference": { "serverUploadMbps": 2.7418211699435346, "serverDownloadMbps": 0.4318144359118179 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "stars", "map": "industrial", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost/industrial-stars-idle/attempt-001", "seconds": 70.0008951, "serverUploadMbps": 73.79995740088502, "serverDownloadMbps": 14.945583168087005 }, "active": { "evidence": "lan-cost/industrial-stars-active/attempt-001", "seconds": 70.002551, "serverUploadMbps": 97.73402368977251, "serverDownloadMbps": 18.55659419814181 }, "difference": { "serverUploadMbps": 23.934066288887493, "serverDownloadMbps": 3.6110110300548044 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "bow", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-bow-idle/attempt-001", "seconds": 70.0004225, "serverUploadMbps": 29.957788693547595, "serverDownloadMbps": 14.869211915339925 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-bow-active/attempt-001", "seconds": 70.0042333, "serverUploadMbps": 38.12944998788711, "serverDownloadMbps": 16.621263024468764 }, "difference": { "serverUploadMbps": 8.171661294339511, "serverDownloadMbps": 1.752051109128839 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "chi", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-chi-idle/attempt-001", "seconds": 70.0026891, "serverUploadMbps": 30.187966655085226, "serverDownloadMbps": 14.867755603351355 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-chi-active/attempt-001", "seconds": 70.0044699, "serverUploadMbps": 37.07572295177203, "serverDownloadMbps": 15.400400706431038 }, "difference": { "serverUploadMbps": 6.887756296686803, "serverDownloadMbps": 0.5326451030796822 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "grenade", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-grenade-idle/attempt-001", "seconds": 70.0036057, "serverUploadMbps": 30.095391311765813, "serverDownloadMbps": 14.920767903105162 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-grenade-active/attempt-001", "seconds": 70.0007583, "serverUploadMbps": 48.27589317588829, "serverDownloadMbps": 17.42927715451136 }, "difference": { "serverUploadMbps": 18.18050186412248, "serverDownloadMbps": 2.508509251406199 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "melee", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-melee-idle/attempt-001", "seconds": 70.0013034, "serverUploadMbps": 30.29003327728141, "serverDownloadMbps": 14.985567414271598 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-melee-active/attempt-001", "seconds": 70.0024525, "serverUploadMbps": 42.541640853803685, "serverDownloadMbps": 15.728150901091665 }, "difference": { "serverUploadMbps": 12.251607576522275, "serverDownloadMbps": 0.7425834868200667 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "net", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-net-idle/attempt-001", "seconds": 70.0069633, "serverUploadMbps": 30.18806242401126, "serverDownloadMbps": 14.986011870885001 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-net-active/attempt-001", "seconds": 70.006534, "serverUploadMbps": 30.69106781354631, "serverDownloadMbps": 15.015444971339988 }, "difference": { "serverUploadMbps": 0.5030053895350513, "serverDownloadMbps": 0.029433100454987482 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "rail", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-rail-idle/attempt-001", "seconds": 70.0097495, "serverUploadMbps": 30.05138000182874, "serverDownloadMbps": 14.878575070987594 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-rail-active/attempt-001", "seconds": 70.0066277, "serverUploadMbps": 42.75894946534646, "serverDownloadMbps": 15.856847607073673 }, "difference": { "serverUploadMbps": 12.707569463517721, "serverDownloadMbps": 0.9782725360860791 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "shadow", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-shadow-idle/attempt-001", "seconds": 70.0028042, "serverUploadMbps": 30.18632184055246, "serverDownloadMbps": 14.9679295151907 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-shadow-active/attempt-001", "seconds": 70.0042986, "serverUploadMbps": 32.66929023584826, "serverDownloadMbps": 15.072567419151328 }, "difference": { "serverUploadMbps": 2.4829683952957993, "serverDownloadMbps": 0.10463790396062755 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." }, { "feature": "stars", "map": "shogun-highlands", "players": 64, "seed": 826401, "repetitions": 1, "idle": { "evidence": "lan-cost-resumed/shogun-highlands-stars-idle/attempt-001", "seconds": 70.0047828, "serverUploadMbps": 30.103456693100267, "serverDownloadMbps": 14.899775057689022 }, "active": { "evidence": "lan-cost-resumed/shogun-highlands-stars-active/attempt-001", "seconds": 70.0085056, "serverUploadMbps": 54.2016141093576, "serverDownloadMbps": 18.469356805699814 }, "difference": { "serverUploadMbps": 24.098157416257333, "serverDownloadMbps": 3.5695817480107923 }, "interpretation": "Encounter delta includes changes in deaths, visibility and movement; not an additive per-holder price." } ], "encounterLimits": [ "Two physical hosts on a wired LAN; one hardware pair.", "64 players and one seed per feature/map pair; no confidence interval.", "Actual permissions, action counts and alive exposure are retained.", "Per-weapon costs change with target density, deaths, cadence and observer count.", "Do not sum marginal deltas to authorize a server capacity increase." ], "impairment": { "scope": "64-player Ironworks stars, recovered5, eight client workers, seed 826901. Single completed clean encounter per condition; not identical replays. Percentiles are maxima of individual client p99 values.", "rows": [ { "path": "Direct LAN", "position_p99_ms": 16.319, "weapon_p99_ms": 13.887, "handoffs": 0 }, { "path": "40 ms added RTT", "position_p99_ms": 40.191, "weapon_p99_ms": 58.7836, "handoffs": 0, "late_actions": 0, "considered_lost_packets": 0, "expired_records": 2 }, { "path": "40 ms added RTT + 1% loss, no jitter", "position_p99_ms": 47.615, "weapon_p99_ms": 68.095, "handoffs": 0, "late_actions": 29, "considered_lost_packets": 17821, "expired_records": 103 }, { "path": "40 ms added RTT + 1% loss + ±2 ms jitter", "position_p99_ms": 87.039, "weapon_p99_ms": 86.527, "handoffs": 2, "late_actions": 35, "considered_lost_packets": 102960, "expired_records": 78488 } ], "interpretation": "Jitter/reordering is a contributor worth isolating further; configured random loss alone does not explain the full degradation. No transport tuning changed based on this result.", "cautions": [ "QUIC considered-lost packets are not a physical packet-drop count.", "Proxy counters include startup/drain; server transport counters cover the measurement window.", "The direct-LAN 50 ms screen does not apply unchanged to deliberately delayed paths.", "No proxy queue/kernel drops were recorded; scheduling-lateness tails remain visible in impairment-proxy-evidence.json." ] }, "mapBounds": { "largest_populated_tested_m": [ 4800, 3840 ], "area_km2": 18.432, "baked_triangles": 980486, "navigation_nodes": 86493, "qualification": "Compiler, movement, render, roaming-AI and short LAN fixtures; not sustained combined bot-combat qualification.", "coordinate_limit_per_axis_m": 4096, "authoring_extent_limit_m": 8192, "extent_is_safe_playable_size": false }, "limitations": "CPU simulation, network delivery, renderer, authoring budgets and projectile flight envelopes are independent; passing isolated measurements does not prove a combined match.", "futureWork": [ "Diagnose dense high-count grant/echo timing per peer before approving a higher general cap", "Expose spurious loss and per-lane expiry; repeat a jitter-only control before transport tuning", "Evaluate conservative projectile/effect interest and conditional objective replication", "Improve large-map navigation further and validate projectile/vertical flight containment before larger playable extents", "Fit any capacity predictor against held-out mixed encounters rather than adding single-weapon costs", "Broader Internet, additional load-generator hardware, integrated real-client rendering/input and minimum-spec qualification" ], "sources": [ { "artifact": "out/engine-capacity-20261026/capacity-envelope.json", "sha256": "3122d3811bb256da01af007b7347f334a0a475dfb5069909fe686b1085d3975c" }, { "artifact": "out/engine-capacity-20261026/confirmation-results.json", "sha256": "2a794e9d132e808504b85b36272096e0b44008398826bdba80c93416e32e3c7f" }, { "artifact": "out/engine-capacity-20261026/observed-costs.json", "sha256": "46e99cf59a103fdec44483294d0fe46b95db3dd6785f45b89e907bf2a7f98686" }, { "artifact": "out/engine-capacity-20261026/network-impairment-findings.json", "sha256": "86d95037ea268bf4b4f9f3f442eff22a6a9e9ea12d1154b433e6e21df9dc3ff9" }, { "artifact": "out/engine-capacity-20261026/remaining-work.json", "sha256": "04a93f90e12b92f6dd747680e06f789cc5676f3569b9c72bc969b45d16812a8f" }, { "artifact": "out/engine-capacity-20261026/confirmation-criteria.json", "sha256": "5d4ff84da13486e3b955f4dab54a2ca7e5c394d8775a07d9135afa2e63f675db" }, { "artifact": "src/net/v24/bytes.hpp", "sha256": "3c11277e5e4b3251e085fb01bd8b2894892def7cf658acb2bf217e5197848413" }, { "artifact": "src/net/transport.hpp", "sha256": "c3b9cc332ae76187aac05a96c50c432282934e667fbcd063f900cde9ce41a62c" }, { "artifact": "docs/netcode/OPTIMIZATION-LOG.md", "sha256": "0af98f2d77d38b3bebdefaf57da317d673b5a750416f97abc2afff9fb4c127b0" }, { "artifact": "docs/PERFORMANCE.md", "sha256": "146063eeab364f132bd7d6fff9027f0bf10f852a5c1f7548854e608621239ef8" } ] }