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nightowl888 pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/lucenenet.git

commit 508389f6ad3478c04482debbbd0f454e0fa16a60
Author: Shad Storhaug <[email protected]>
AuthorDate: Sun Jun 28 22:50:21 2020 +0700

    Lucene.Net.Util.Automaton.DacuikMihovAutomatonBuilder: Reduce the number of 
zero length array allocations (#295, #261)
---
 .../Util/Automaton/DaciukMihovAutomatonBuilder.cs         | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/Lucene.Net/Util/Automaton/DaciukMihovAutomatonBuilder.cs 
b/src/Lucene.Net/Util/Automaton/DaciukMihovAutomatonBuilder.cs
index 7ff1a6a..166c58e 100644
--- a/src/Lucene.Net/Util/Automaton/DaciukMihovAutomatonBuilder.cs
+++ b/src/Lucene.Net/Util/Automaton/DaciukMihovAutomatonBuilder.cs
@@ -42,11 +42,20 @@ namespace Lucene.Net.Util.Automaton
         {
             /// <summary>
             /// An empty set of labels. </summary>
-            private static readonly int[] NO_LABELS = new int[0];
-
+            private static readonly int[] NO_LABELS =
+#if FEATURE_ARRAYEMPTY
+                Array.Empty<int>();
+#else
+                new int[0];
+#endif
             /// <summary>
             /// An empty set of states. </summary>
-            private static readonly State[] NO_STATES = new State[0];
+            private static readonly State[] NO_STATES =
+#if FEATURE_ARRAYEMPTY
+                Array.Empty<State>();
+#else
+                new State[0];
+#endif
 
             /// <summary>
             /// Labels of outgoing transitions. Indexed identically to <see 
cref="states"/>.

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