From 7a0b15c20ea2b233659a7a17c75b427db1fa7574 Mon Sep 17 00:00:00 2001
From: Tyler Veness <calcmogul@gmail.com>
Date: Fri, 16 Aug 2024 22:04:00 -0700
Subject: [PATCH] Skip some clock reads when diagnostics are disabled (#628)

---
 src/optimization/solver/InteriorPoint.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/optimization/solver/InteriorPoint.cpp b/src/optimization/solver/InteriorPoint.cpp
index 817e3d1d..dcd8b56d 100644
--- a/src/optimization/solver/InteriorPoint.cpp
+++ b/src/optimization/solver/InteriorPoint.cpp
@@ -240,11 +240,16 @@ void InteriorPoint(std::span<Variable> decisionVariables,
   // Error estimate
   double E_0 = std::numeric_limits<double>::infinity();
 
-  iterationsStartTime = std::chrono::system_clock::now();
+  if (config.diagnostics) {
+    iterationsStartTime = std::chrono::system_clock::now();
+  }
 
   while (E_0 > config.tolerance &&
          acceptableIterCounter < config.maxAcceptableIterations) {
-    auto innerIterStartTime = std::chrono::system_clock::now();
+    std::chrono::system_clock::time_point innerIterStartTime;
+    if (config.diagnostics) {
+      innerIterStartTime = std::chrono::system_clock::now();
+    }
 
     // Check for local equality constraint infeasibility
     if (IsEqualityLocallyInfeasible(A_e, c_e)) {