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Session 10

Session 10 (2026-02-12)

  • Capture: /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz
  • Capture SHA256: 8d6cb578c32252b536971a12891e7701b22e3d2b3117015bca1f38567849aa41
  • First mismatch: n/a (tooling/performance session)

Key Findings

  • Baseline uncached timings on this capture:
  • uv run crimson original divergence-report <capture> --no-cache: 56.34s.
  • uv run crimson original divergence-report <capture> --no-cache --float-abs-tol 1e-3 --window 24 --lead-lookback 1024 --run-summary-short --run-summary-focus-context --run-summary-focus-before 8 --run-summary-focus-after 4 --run-summary-short-max-rows 30: 75.24s.
  • uv run crimson original focus-trace <capture> --tick 389 --no-cache: 19.73s.
  • uv run crimson original focus-trace <capture> --tick 10000 --no-cache: 69.75s.
  • Cached daemon timings after clearing sidecars and restarting cold:
  • cold: divergence-report triage command 44.51s.
  • hot: same divergence-report triage command 0.20s.
  • focus-trace --tick 389: 0.71s.
  • nearby focus-trace --tick 390: 0.17s.
  • backward-nearby focus-trace --tick 388: 0.19s.
  • far focus-trace --tick 10000: 52.47s.
  • adjacent after far focus-trace --tick 10001: 0.17s.

Landed Changes

  • Added hybrid cache daemon + sidecar caching for original divergence-report and original focus-trace.
  • Added --no-cache opt-out and environment knobs:
  • CRIMSON_ORIGINAL_CACHE=0|1
  • CRIMSON_ORIGINAL_CACHE_DIR
  • CRIMSON_ORIGINAL_CACHE_SOCKET
  • Added daemon fallback behavior to preserve local in-process execution when cache mode is unavailable.

Validation

  • uv run pytest tests/test_original_diagnostics_cache.py tests/test_original_diagnostics_daemon.py
  • uv run ruff check src/crimson/original/diagnostics_cache.py src/crimson/original/diagnostics_daemon.py src/crimson/original/divergence_report.py src/crimson/original/focus_trace.py src/crimson/cli.py tests/test_original_diagnostics_cache.py tests/test_original_diagnostics_daemon.py
  • uv run crimson original divergence-report /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --no-cache
  • uv run crimson original divergence-report /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --no-cache --float-abs-tol 1e-3 --window 24 --lead-lookback 1024 --run-summary-short --run-summary-focus-context --run-summary-focus-before 8 --run-summary-focus-after 4 --run-summary-short-max-rows 30
  • uv run crimson original focus-trace /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --tick 389 --no-cache
  • uv run crimson original focus-trace /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --tick 10000 --no-cache
  • uv run crimson original divergence-report /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --float-abs-tol 1e-3 --window 24 --lead-lookback 1024 --run-summary-short --run-summary-focus-context --run-summary-focus-before 8 --run-summary-focus-after 4 --run-summary-short-max-rows 30 (cold + hot)
  • uv run crimson original focus-trace /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --tick 389
  • uv run crimson original focus-trace /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --tick 390
  • uv run crimson original focus-trace /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --tick 388
  • uv run crimson original focus-trace /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --tick 10000
  • uv run crimson original focus-trace /Users/banteg/syncthing/frida/gameplay_diff_capture.json.gz --tick 10001

Outcome / Next Probe

  • Hot-path targets are met for repeated same-capture diagnostics (<=2s divergence hot, <=1s nearby focus hot).
  • Remaining cold-path bottleneck is far-tick focus replay stepping; next optimization should prioritize stronger anchor coverage or compact state snapshot restore for long-range random tick access.