PVCamera: leave buffer uninitialised instead of initialising to zeros.

carandraug · carandraug · commit 458485667bde · 2022-07-09T17:27:31.000+01:00
diff --git a/microscope/cameras/pvcam.py b/microscope/cameras/pvcam.py
@@ -1528,7 +1528,7 @@ def cb():
                 self.roi.width // self.binning.h,
             )
             self._buffer = np.require(
-                np.zeros(buffer_shape, dtype=buffer_dtype),
+                np.empty(buffer_shape, dtype=buffer_dtype),
                 requirements=["C_CONTIGUOUS", "ALIGNED", "OWNDATA"],
             )
         else:
@@ -1565,7 +1565,7 @@ def cb():
                 self.roi.width // self.binning.h,
             )
             self._buffer = np.require(
-                np.zeros(buffer_shape, dtype=buffer_dtype),
+                np.empty(buffer_shape, dtype=buffer_dtype),
                 requirements=["C_CONTIGUOUS", "ALIGNED", "OWNDATA"],
             )
             nbytes = _exp_setup_cont(

Original file line number	Diff line number	Diff line change
`@@ -1528,7 +1528,7 @@ def cb():`
`1528`	`1528`	`self.roi.width // self.binning.h,`
`1529`	`1529`	`)`
`1530`	`1530`	`self._buffer = np.require(`
`1531`		`- np.zeros(buffer_shape, dtype=buffer_dtype),`
	`1531`	`+ np.empty(buffer_shape, dtype=buffer_dtype),`
`1532`	`1532`	`requirements=["C_CONTIGUOUS", "ALIGNED", "OWNDATA"],`
`1533`	`1533`	`)`
`1534`	`1534`	`else:`
`@@ -1565,7 +1565,7 @@ def cb():`
`1565`	`1565`	`self.roi.width // self.binning.h,`
`1566`	`1566`	`)`
`1567`	`1567`	`self._buffer = np.require(`
`1568`		`- np.zeros(buffer_shape, dtype=buffer_dtype),`
	`1568`	`+ np.empty(buffer_shape, dtype=buffer_dtype),`
`1569`	`1569`	`requirements=["C_CONTIGUOUS", "ALIGNED", "OWNDATA"],`
`1570`	`1570`	`)`
`1571`	`1571`	`nbytes = _exp_setup_cont(`