perf: Avoid use of glob for fetching python executable

glob on env/**/bin is slowest operation in terms of overhead on CLI.

bench/utils/bench.py

@@ -32,17 +32,21 @@
 
 @lru_cache(maxsize=None)
 def get_env_cmd(cmd: str, bench_path: str = ".") -> str:
-	# this supports envs' generated by patched virtualenv or venv (which may cause an extra 'local' folder to be created)
+	exact_location = os.path.abspath(
+		os.path.join(bench_path, "env", "bin", cmd.strip("*"))
+	)
+	if os.path.exists(exact_location):
+		return exact_location
 
+	# this supports envs' generated by patched virtualenv or venv (which may cause an extra 'local' folder to be created)
 	existing_python_bins = glob(
 		os.path.join(bench_path, "env", "**", "bin", cmd), recursive=True
 	)
 
 	if existing_python_bins:
 		return os.path.abspath(existing_python_bins[0])
 
-	cmd = cmd.strip("*")
-	return os.path.abspath(os.path.join(bench_path, "env", "bin", cmd))
+	return exact_location
 
 
 def get_venv_path(verbose=False, python="python3"):