From 1d2c41ae54bdf15d1c1639d3f0b58f80e9beb512 Mon Sep 17 00:00:00 2001
From: Fabian Joswig <fabian.joswig@ed.ac.uk>
Date: Tue, 19 Jul 2022 12:49:32 +0100
Subject: [PATCH] feat: further speed up of GEVP by skipping the call to
 matrix_symmetric if matrix is already symmetric.

---
 pyerrors/correlators.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pyerrors/correlators.py b/pyerrors/correlators.py
index e11ef6f9..b4a26f53 100644
--- a/pyerrors/correlators.py
+++ b/pyerrors/correlators.py
@@ -301,7 +301,11 @@ class Corr:
             warnings.warn("Argument 'sorted_list' is deprecated, use 'sort' instead.", DeprecationWarning)
             sort = kwargs.get("sorted_list")
 
-        symmetric_corr = self.matrix_symmetric()
+        if self.is_matrix_symmetric():
+            symmetric_corr = self
+        else:
+            symmetric_corr = self.matrix_symmetric()
+
         if sort is None:
             if (ts is None):
                 raise Exception("ts is required if sort=None.")