From 518250eafd63021e178571c9204efafb9f98b329 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Fri, 18 Sep 2026 04:19:16 +0000
Subject: [PATCH] perf: memoize _get_default_github using @lru_cache

Cache the default GitHub username computation in scripts/init.py using @lru_cache(maxsize=1) to eliminate redundant git config and git remote inspection calls.
---
 scripts/init.py    | 2 ++
 tests/test_init.py | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/scripts/init.py b/scripts/init.py
index c4c8cae..06a0290 100644
--- a/scripts/init.py
+++ b/scripts/init.py
@@ -1,6 +1,7 @@
 import os
 import re
 import shutil
+from functools import lru_cache
 from pathlib import Path
 from subprocess import CalledProcessError, TimeoutExpired, check_output
 
@@ -64,6 +65,7 @@ def _get_git_config(key: str) -> str:
         return ""
 
 
+@lru_cache(maxsize=1)
 def _get_default_github() -> str:
     # Try git config first
     username = _get_git_config("github.user") or _get_git_config("user.name")
diff --git a/tests/test_init.py b/tests/test_init.py
index 977f56a..1329110 100644
--- a/tests/test_init.py
+++ b/tests/test_init.py
@@ -67,12 +67,16 @@ def mock_check_output(args, **kwargs):
 
 
 def test_get_default_github(monkeypatch):
+    # Clear lru_cache on _get_default_github before testing
+    init._get_default_github.cache_clear()
+
     # Case 1: valid username in git config
     monkeypatch.setattr(init, "_git_config_loaded", True)
     monkeypatch.setattr(init, "_git_config_cache", {"github.user": "jane-doe"})
     assert init._get_default_github() == "jane-doe"
 
     # Case 2: invalid username in git config, fallback to remote URL (HTTPS format)
+    init._get_default_github.cache_clear()
     monkeypatch.setattr(init, "_git_config_cache", {})
 
     def mock_check_output(args, **kwargs):
@@ -84,6 +88,8 @@ def mock_check_output(args, **kwargs):
     assert init._get_default_github() == "some-org"
 
     # Case 3: invalid username in git config, fallback to remote URL (SSH format)
+    init._get_default_github.cache_clear()
+
     def mock_check_output_ssh(args, **kwargs):
         if "remote" in args and "get-url" in args:
             return "git@github.com:ssh-user/some-repo.git\n"