- WGC: replace per-frame ~30 MB BGRA->RGB fancy-index allocation with
cv2.cvtColor into a 3-slot pre-allocated RGB pool. Use gc.collect(0)
on cleanup instead of full GC to avoid multi-hundred-ms stalls.
- MSS: switch from screenshot.rgb (pure-Python BGRA->RGB rebuild) to
screenshot.raw + cv2.cvtColor into a pooled buffer. Add cheap 256-byte
hash-based change detection so idle frames return None — matches
DXcam/BetterCam semantics.
- DXcam/BetterCam: fix silent factory leak — Python name-mangling
rewrote self._dxcam.__factory to _DXcamCaptureStream__factory inside
the class body, so cleanup never reached the real attribute. Use
getattr with string literal to bypass mangling.
- calculate_dominant_color: replace np.random.choice(replace=False)
(full sort) with np.random.randint, and np.unique(axis=0) (lexsort)
with packed-RGB np.bincount. ~10x faster on dominant mode.
- calibration._map_edge_average: switch cached scratch buffers from
float64 to float32. Halves memory bandwidth on the dominant reduction
path; range-safe up to 8K screens.
- All engines: per-frame DEBUG logs use structlog kwarg style instead
of f-strings to avoid per-frame string allocation.
alexei.dolgolyov
f184ef0afb