From 45b237453ae806b056220f1d2c2685f48e1fbe5b Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 8 Mar 2016 11:52:13 +0100
Subject: [PATCH] hydra-queue-runner: Recycle finishedDrvs

This should prevent the queue monitor thread from looking up the same
derivations over and over again.
---
 src/hydra-queue-runner/queue-monitor.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hydra-queue-runner/queue-monitor.cc b/src/hydra-queue-runner/queue-monitor.cc
index c309ddc0..605102af 100644
--- a/src/hydra-queue-runner/queue-monitor.cc
+++ b/src/hydra-queue-runner/queue-monitor.cc
@@ -114,6 +114,7 @@ bool State::getQueuedBuilds(Connection & conn, ref<Store> localStore,
     std::set<Step::ptr> newRunnable;
     unsigned int nrAdded;
     std::function<void(Build::ptr)> createBuild;
+    std::set<Path> finishedDrvs;
 
     createBuild = [&](Build::ptr build) {
         printMsg(lvlTalkative, format("loading build %1% (%2%)") % build->id % build->fullJobName());
@@ -139,7 +140,6 @@ bool State::getQueuedBuilds(Connection & conn, ref<Store> localStore,
         }
 
         std::set<Step::ptr> newSteps;
-        std::set<Path> finishedDrvs; // FIXME: re-use?
         Step::ptr step = createStep(destStore, conn, build, build->drvPath,
             build, 0, finishedDrvs, newSteps, newRunnable);