From e04c5db67641a65d66940513853cb19d540d60db Mon Sep 17 00:00:00 2001
From: Satia Herfert <satiaherfert@gmx.de>
Date: Fri, 23 Mar 2018 16:55:50 +0100
Subject: [PATCH] Compare LocalDateTimes faster by pre-computing epochSecond.

---
 .../neo4j/values/storable/LocalDateTimeValue.java   | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/community/values/src/main/java/org/neo4j/values/storable/LocalDateTimeValue.java b/community/values/src/main/java/org/neo4j/values/storable/LocalDateTimeValue.java
index a56da8c2d9aa5..34b7fffe3d986 100644
--- a/community/values/src/main/java/org/neo4j/values/storable/LocalDateTimeValue.java
+++ b/community/values/src/main/java/org/neo4j/values/storable/LocalDateTimeValue.java
@@ -263,17 +263,24 @@ protected LocalDateTimeValue selectDateTime( AnyValue datetime )
     }
 
     private final LocalDateTime value;
+    private final long epochSecondsInUTC;
 
     private LocalDateTimeValue( LocalDateTime value )
     {
         this.value = value;
+        this.epochSecondsInUTC = this.value.toEpochSecond(UTC);
     }
 
     @Override
-    int unsafeCompareTo( Value otherValue )
+    int unsafeCompareTo( Value other )
     {
-        LocalDateTimeValue other = (LocalDateTimeValue) otherValue;
-        return value.compareTo( other.value );
+        LocalDateTimeValue that = (LocalDateTimeValue) other;
+        int cmp = Long.compare( epochSecondsInUTC, that.epochSecondsInUTC );
+        if ( cmp == 0 )
+        {
+            cmp = value.getNano() - that.value.getNano();
+        }
+        return cmp;
     }
 
     @Override