From 80f1d791544c8dbb262dadf2cefe4e32a819928c Mon Sep 17 00:00:00 2001
From: Dongdong Tian <seisman.info@gmail.com>
Date: Thu, 28 Dec 2023 21:59:58 +0800
Subject: [PATCH] clib: Search and load the GMT library only one time

---
 pygmt/clib/session.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pygmt/clib/session.py b/pygmt/clib/session.py
index 1f338851a9a..b6a7f4c7bb6 100644
--- a/pygmt/clib/session.py
+++ b/pygmt/clib/session.py
@@ -87,6 +87,9 @@
     np.datetime64: "GMT_DATETIME",
 }
 
+# load the GMT library outside the Session class so it's loaded once.
+_libgmt = load_libgmt()
+
 
 class Session:
     """
@@ -308,7 +311,7 @@ def get_libgmt_func(self, name, argtypes=None, restype=None):
         <class 'ctypes.CDLL.__init__.<locals>._FuncPtr'>
         """
         if not hasattr(self, "_libgmt"):
-            self._libgmt = load_libgmt()
+            self._libgmt = _libgmt
         function = getattr(self._libgmt, name)
         if argtypes is not None:
             function.argtypes = argtypes