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    {
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      "dropped_simulation_seconds": 0.0,
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      "interpolation_alpha": 0.0,
      "physics_debug": false,
      "render_call_ms": 3.279987,
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      "renderer_readback_cpu_ms": 0.664774,
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  "startup_ms": {
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    "renderer_initialization": 323.914923,
    "scene_read": 0.505263,
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    "gpu": {
      "max": 0.61888,
      "min": 0.60528,
      "p50": 0.606208,
      "p95": 0.61888,
      "samples": 6
    },
    "render_call": {
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      "min": 3.279987,
      "p50": 4.80823,
      "p95": 14.210575,
      "samples": 6
    },
    "renderer_cpu": {
      "max": 14.203583,
      "min": 3.266321,
      "p50": 4.797389,
      "p95": 14.203583,
      "samples": 6
    },
    "renderer_readback_cpu": {
      "max": 6.924622,
      "min": 0.641901,
      "p50": 0.664774,
      "p95": 6.924622,
      "samples": 6
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    "simulation": {
      "max": 0.32371,
      "min": 0.255843,
      "p50": 0.290087,
      "p95": 0.32371,
      "samples": 6
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    "snapshot": {
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      "p50": 0.245643,
      "p95": 1.021316,
      "samples": 6
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    "wall": {
      "max": 15.597061,
      "min": 3.862496,
      "p50": 5.392282,
      "p95": 15.597061,
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  "timing_notes": "Durations use steady_clock wall time, not thread CPU usage. render_call/renderer_cpu include GPU waits, readback and window presentation. renderer_readback_cpu measures map/copy/unmap wall time within that call. GPU timestamps cover submitted rendering, not CPU work. A missing/zero GPU timestamp is null. Frame durations exclude profile bookkeeping and final capture/profile file writes. Startup begins at Player application entry after platform argument normalization, excluding OS loader/launcher.",
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  "version": 1,
  "visibility_mode": "gpu-frustum",
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}