disable line coverage events for hypothesis files

HypothesisWorks · Nov 17, 2024 · 96d74dc · 96d74dc
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commit 96d74dc
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diff --git a/hypothesis-python/RELEASE.rst b/hypothesis-python/RELEASE.rst
@@ -0,0 +1,3 @@
+RELEASE_TYPE: patch
+
+Hypothesis collects coverage information during the :ref:`shrinking hypothesis.Phase.shrink` and :ref:`explain hypothesis.Phase.explain` phases in order to show a more informative error message. On 3.12+, this uses :mod:`sys.monitoring`. This patch improves the performance of coverage collection on 3.12+ by disabling events we don't need.
diff --git a/hypothesis-python/src/hypothesis/internal/scrutineer.py b/hypothesis-python/src/hypothesis/internal/scrutineer.py
@@ -76,7 +76,6 @@ def trace(self, frame, event, arg):
             if event == "call":
                 return self.trace
             elif event == "line":
-                # manual inlining of self.trace_line for performance.
                 fname = frame.f_code.co_filename
                 if should_trace_file(fname):
                     current_location = (fname, frame.f_lineno)
@@ -87,10 +86,12 @@ def trace(self, frame, event, arg):
 
     def trace_line(self, code: types.CodeType, line_number: int) -> None:
         fname = code.co_filename
-        if should_trace_file(fname):
-            current_location = (fname, line_number)
-            self.branches.add((self._previous_location, current_location))
-            self._previous_location = current_location
+        if not should_trace_file(fname):
+            return sys.monitoring.DISABLE
+
+        current_location = (fname, line_number)
+        self.branches.add((self._previous_location, current_location))
+        self._previous_location = current_location
 
     def __enter__(self):
         if not self._should_trace:
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		RELEASE_TYPE: patch

		Hypothesis collects coverage information during the :ref:`shrinking hypothesis.Phase.shrink` and :ref:`explain hypothesis.Phase.explain` phases in order to show a more informative error message. On 3.12+, this uses :mod:`sys.monitoring`. This patch improves the performance of coverage collection on 3.12+ by disabling events we don't need.