From 52d43793bc5010ae35559a2ec70982a3c35a71c1 Mon Sep 17 00:00:00 2001
From: "Gregory.Shrago" <gregory.shrago@jetbrains.com>
Date: Tue, 31 Jan 2017 23:57:16 +0300
Subject: [PATCH] less garbage: no new instance on empty collection

---
 platform/util/src/com/intellij/util/containers/JBIterable.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platform/util/src/com/intellij/util/containers/JBIterable.java b/platform/util/src/com/intellij/util/containers/JBIterable.java
index cb944e98df23..dfd862eae595 100644
--- a/platform/util/src/com/intellij/util/containers/JBIterable.java
+++ b/platform/util/src/com/intellij/util/containers/JBIterable.java
@@ -87,6 +87,7 @@ public abstract class JBIterable<E> implements Iterable<E> {
   public static <E> JBIterable<E> from(@Nullable Iterable<? extends E> iterable) {
     if (iterable == null) return empty();
     if (iterable instanceof JBIterable) return (JBIterable<E>)iterable;
+    if (iterable instanceof Collection && ((Collection)iterable).isEmpty()) return empty();
     return new JBIterable<E>((Iterable<E>)iterable) {
       @Override
       public Iterator<E> iterator() {