From 35c5be004fe93652850411c6fe3dbe4f9d57ae81 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Sun, 2 Sep 2018 19:56:26 +0100
Subject: [PATCH] Reduce CPU hit in FGTaxiSegment::unblock

size() is O(N), empty() is constant time.
---
 src/Airports/groundnetwork.cxx | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/src/Airports/groundnetwork.cxx b/src/Airports/groundnetwork.cxx
index 36947dfb7..51b96c82a 100644
--- a/src/Airports/groundnetwork.cxx
+++ b/src/Airports/groundnetwork.cxx
@@ -121,16 +121,14 @@ bool FGTaxiSegment::hasBlock(time_t now)
 
 void FGTaxiSegment::unblock(time_t now)
 {
-    if (blockTimes.size()) {
-        BlockListIterator i = blockTimes.begin();
-        if (i->getTimeStamp() < (now - 30)) {
-            blockTimes.erase(i);
-        }
+    if (blockTimes.empty())
+        return;
+    
+    if (blockTimes.front().getTimeStamp() < (now - 30)) {
+        blockTimes.erase(blockTimes.begin());
     }
 }
 
-
-
 /***************************************************************************
  * FGTaxiRoute
  **************************************************************************/