Hide IPython internal frame by default.

This should help with joerick#313

In most case it should have no effects as anyway all the root of the
tree is removed as there is no time spent in it. Though with some
compiled code and threads, some time may be affected to the root.

pyinstrument/processors.py

@@ -294,3 +294,16 @@ def is_runpy_frame(frame: Frame):
     result.remove_from_parent()
 
     return result
+
+
+def group_ipython_frames_processor(frame, options: ProcessorOptions) -> Frame | None:
+    """
+    In some case the IPython's magic show all the internal IPython frames, which makes
+    traces hard to read.
+
+    This will collapse most of IPython internal frames.
+    """
+    return group_library_frames_processor(
+        frame,
+        {"hide_regex": ".+((IPython)|(ipykernel.zmqshell)|(pyinstrument.magic.magic))"},
+    )

pyinstrument/renderers/console.py

@@ -216,6 +216,7 @@ def default_processors(self) -> ProcessorList:
             processors.remove_irrelevant_nodes,
             processors.remove_first_pyinstrument_frames_processor,
             processors.group_library_frames_processor,
+            processors.group_ipython_frames_processor,
         ]
 
     class colors_enabled:

pyinstrument/renderers/html.py

@@ -100,4 +100,5 @@ def default_processors(self) -> ProcessorList:
             processors.remove_irrelevant_nodes,
             processors.remove_first_pyinstrument_frames_processor,
             processors.group_library_frames_processor,
+            processors.group_ipython_frames_processor,
         ]

pyinstrument/session.py

@@ -127,6 +127,11 @@ def root_frame(self, trim_stem: bool = True) -> Frame | None:
         if trim_stem:
             root_frame = self._trim_stem(root_frame)
 
+        group_library_frames_processor(
+            root_frame,
+            {"hide_regex": ".+((IPython)|(ipykernel.zmqshell)|(pyinstrument.magic.magic))"},
+        )
+
         return root_frame
 
     def _trim_stem(self, frame: Frame):