From 2bc6304793e14e44d6d24c1fb35666352c7106f2 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 1 Apr 2019 21:09:35 +0200
Subject: [PATCH] getMachines(): Cache result

---
 src/libstore/machines.cc | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/libstore/machines.cc b/src/libstore/machines.cc
index edd03d147..f848582da 100644
--- a/src/libstore/machines.cc
+++ b/src/libstore/machines.cc
@@ -89,10 +89,11 @@ void parseMachines(const std::string & s, Machines & machines)
 
 Machines getMachines()
 {
-    Machines machines;
-
-    parseMachines(settings.builders, machines);
-
+    static auto machines = [&]() {
+        Machines machines;
+        parseMachines(settings.builders, machines);
+        return machines;
+    }();
     return machines;
 }