use 'pstats' not 'prof' for file extension and renderer option

pyinstrument/__main__.py

@@ -87,7 +87,7 @@ def dash_m_callback(option: str, opt: str, value: str, parser: optparse.OptionPa
         action="store",
         type="string",
         help=(
-            "how the report should be rendered. One of: 'text', 'html', 'json', 'speedscope', 'prof', "
+            "how the report should be rendered. One of: 'text', 'html', 'json', 'speedscope', 'pstats', "
             "or python import path to a renderer class. Defaults to the appropriate format "
             "for the extension if OUTFILE is given, otherwise, defaults to 'text'."
         ),
@@ -456,7 +456,7 @@ def get_renderer_class(renderer: str) -> type[renderers.Renderer]:
         return renderers.SpeedscopeRenderer
     elif renderer == "session":
         return renderers.SessionRenderer
-    elif renderer == "prof":
+    elif renderer == "pstats":
         return renderers.PstatsRenderer
     else:
         try:
@@ -465,7 +465,7 @@ def get_renderer_class(renderer: str) -> type[renderers.Renderer]:
             # ValueError means we failed to import this object
             raise OptionsParseError(
                 f"Failed to find renderer with name {renderer!r}.\n"
-                "Options are text, html, json, speedscope, prof or a Python\n"
+                "Options are text, html, json, speedscope, pstats or a Python\n"
                 "import path to a Renderer class.\n"
                 "\n"
                 f"Underlying error: {err}\n"
@@ -488,8 +488,8 @@ def guess_renderer_from_outfile(outfile: str) -> str | None:
         return "json"
     elif ext == ".pyisession":
         return "session"
-    elif ext == ".prof":
-        return "prof"
+    elif ext == ".pstats":
+        return "pstats"
     else:
         return None
 

pyinstrument/renderers/pstatsrenderer.py

@@ -22,7 +22,7 @@ class PstatsRenderer(FrameRenderer):
     suitable for processing by gprof2dot and snakeviz.
     """
 
-    output_file_extension = "prof"
+    output_file_extension = "pstats"
     output_is_binary = True
 
     def __init__(self, **kwargs: Any):

test/test_pstats_renderer.py

@@ -43,10 +43,10 @@ def profiler_session():
 
 
 def test_pstats_renderer(profiler_session, tmp_path):
-    fname = tmp_path / "test.prof"
-    prof = PstatsRenderer().render(profiler_session)
+    fname = tmp_path / "test.pstats"
+    pstats = PstatsRenderer().render(profiler_session)
     with open(fname, "w", encoding="utf-8", errors="surrogateescape") as fid:
-        fid.write(prof)
+        fid.write(pstats)
     stats: Any = Stats(str(fname))
     # Sanity check
     assert stats.total_tt > 0