Merge pull request #22060 from eendebakpt/performance/import_time

PERF: Improve import time of numpy

1 files changed, 29 insertions, 8 deletions

diff --git a/numpy/core/_add_newdocs_scalars.py b/numpy/core/_add_newdocs_scalars.py
index 94859a9d5..491052fae 100644
--- a/numpy/core/_add_newdocs_scalars.py
+++ b/numpy/core/_add_newdocs_scalars.py
@@ -3,10 +3,11 @@ This file is separate from ``_add_newdocs.py`` so that it can be mocked out by
 our sphinx ``conf.py`` during doc builds, where we want to avoid showing
 platform-dependent information.
 """
+import sys
+import os
 from numpy.core import dtype
 from numpy.core import numerictypes as _numerictypes
 from numpy.core.function_base import add_newdoc
-import platform
 
 ##############################################################################
 #
@@ -50,6 +51,21 @@ possible_aliases = numeric_type_aliases([
     ])
 
 
+def _get_platform_and_machine():
+    try:
+        system, _, _, _, machine = os.uname()
+    except AttributeError:
+        system = sys.platform
+        if system == 'win32':
+            machine = os.environ.get('PROCESSOR_ARCHITEW6432', '') \
+                    or os.environ.get('PROCESSOR_ARCHITECTURE', '')
+        else:
+            machine = 'unknown'
+    return system, machine
+
+
+_system, _machine = _get_platform_and_machine()
+_doc_alias_string = f":Alias on this platform ({_system} {_machine}):"
 
 
 def add_newdoc_for_scalar_type(obj, fixed_aliases, doc):
@@ -57,17 +73,22 @@ def add_newdoc_for_scalar_type(obj, fixed_aliases, doc):
     o = getattr(_numerictypes, obj)
 
     character_code = dtype(o).char
-    canonical_name_doc = "" if obj == o.__name__ else ":Canonical name: `numpy.{}`\n    ".format(obj)
-    alias_doc = ''.join(":Alias: `numpy.{}`\n    ".format(alias) for alias in fixed_aliases)
-    alias_doc += ''.join(":Alias on this platform ({} {}): `numpy.{}`: {}.\n    ".format(platform.system(), platform.machine(), alias, doc)
+    canonical_name_doc = "" if obj == o.__name__ else \
+                        f":Canonical name: `numpy.{obj}`\n    "
+    if fixed_aliases:
+        alias_doc = ''.join(f":Alias: `numpy.{alias}`\n    "
+                            for alias in fixed_aliases)
+    else:
+        alias_doc = ''
+    alias_doc += ''.join(f"{_doc_alias_string} `numpy.{alias}`: {doc}.\n    "
                          for (alias_type, alias, doc) in possible_aliases if alias_type is o)
-    docstring = """
-    {doc}
+
+    docstring = f"""
+    {doc.strip()}
 
     :Character code: ``'{character_code}'``
     {canonical_name_doc}{alias_doc}
-    """.format(doc=doc.strip(), character_code=character_code,
-               canonical_name_doc=canonical_name_doc, alias_doc=alias_doc)
+    """
 
     add_newdoc('numpy.core.numerictypes', obj, docstring)