From c053271df8e182f80e179ac8dd1c7c71a92cce4b Mon Sep 17 00:00:00 2001
From: Stefan Bodewig <bodewig@apache.org>
Date: Sat, 17 Feb 2018 07:54:01 +0100
Subject: [PATCH] tiny performance tweak

---
 src/main/org/apache/tools/ant/types/resources/AllButFirst.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/org/apache/tools/ant/types/resources/AllButFirst.java b/src/main/org/apache/tools/ant/types/resources/AllButFirst.java
index f6bcf4985..f49181bf1 100644
--- a/src/main/org/apache/tools/ant/types/resources/AllButFirst.java
+++ b/src/main/org/apache/tools/ant/types/resources/AllButFirst.java
@@ -42,7 +42,7 @@ public class AllButFirst extends SizeLimitCollection {
 
     @Override
     public synchronized int size() {
-        return (int) getResourceCollection().stream().skip(getValidCount()).count();
+        return Math.max(getResourceCollection().size() - getValidCount(), 0);
     }
 
 }