From c6bdab8b4c480dcb4ed8a6c2d09df4ae6cb97643 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Sat, 2 Oct 2021 17:29:05 -0400
Subject: [PATCH] disable optimization of cputime function for MSVC++ to avoid
 bogus 0s reports

---
 src/platform.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/platform.cpp b/src/platform.cpp
index 3dd08d46ce..530ec8fabf 100644
--- a/src/platform.cpp
+++ b/src/platform.cpp
@@ -112,6 +112,8 @@ using namespace LAMMPS_NS;
 // clang compilers are optimizing this function too aggressively returning always 0
 #if defined(__clang__)
 [[clang::optnone]]
+#elif defined(_MSC_VER)
+#pragma optimize("",off)
 #endif
 double platform::cputime()
 // clang-format on
@@ -143,6 +145,9 @@ double platform::cputime()
 
   return rv;
 }
+#if defined(_MSC_VER)
+#pragma optimize("",on)
+#endif
 
 /* ----------------------------------------------------------------------
    get wall time