reduce more internal examples

hypothesis-python/src/hypothesis/internal/conjecture/utils.py

@@ -173,7 +173,8 @@ def sample(
         forced: Optional[int] = None,
         fake_forced: bool = False,
     ) -> int:
-        data.start_example(SAMPLE_IN_SAMPLER_LABEL)
+        if self.observe:
+            data.start_example(SAMPLE_IN_SAMPLER_LABEL)
         forced_choice = (  # pragma: no branch # https://github.com/nedbat/coveragepy/issues/1617
             None
             if forced is None
@@ -203,7 +204,8 @@ def sample(
             fake_forced=fake_forced,
             observe=self.observe,
         )
-        data.stop_example()
+        if self.observe:
+            data.stop_example()
         if use_alternate:
             assert forced is None or alternate == forced, (forced, alternate)
             return alternate
@@ -254,15 +256,23 @@ def __init__(
         self.rejected = False
         self.observe = observe
 
+    def stop_example(self):
+        if self.observe:
+            self.data.stop_example()
+
+    def start_example(self, label):
+        if self.observe:
+            self.data.start_example(label)
+
     def more(self) -> bool:
         """Should I draw another element to add to the collection?"""
         if self.drawn:
-            self.data.stop_example()
+            self.stop_example()
 
         self.drawn = True
         self.rejected = False
 
-        self.data.start_example(ONE_FROM_MANY_LABEL)
+        self.start_example(ONE_FROM_MANY_LABEL)
         if self.min_size == self.max_size:
             # if we have to hit an exact size, draw unconditionally until that
             # point, and no further.
@@ -291,7 +301,7 @@ def more(self) -> bool:
             self.count += 1
             return True
         else:
-            self.data.stop_example()
+            self.stop_example()
             return False
 
     def reject(self, why: Optional[str] = None) -> None: