From e9ab97ae141239d0d2a9317eb7113e2b08bf3a89 Mon Sep 17 00:00:00 2001
From: Sascha Wiedenfeld <sascha.wiedenfeld@opitz-consulting.com>
Date: Fri, 12 Jun 2020 14:15:13 +0200
Subject: [PATCH] Compile each file match pattern only once

#1409
---
 .../java/com/github/dockerjava/core/GoLangFileMatch.java    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/docker-java-core/src/main/java/com/github/dockerjava/core/GoLangFileMatch.java b/docker-java-core/src/main/java/com/github/dockerjava/core/GoLangFileMatch.java
index 445c00120..be82e6262 100644
--- a/docker-java-core/src/main/java/com/github/dockerjava/core/GoLangFileMatch.java
+++ b/docker-java-core/src/main/java/com/github/dockerjava/core/GoLangFileMatch.java
@@ -5,7 +5,9 @@
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.regex.Pattern;
 
 import org.apache.commons.lang.StringUtils;
@@ -52,6 +54,8 @@ private GoLangFileMatch() {
 
     private static final String PATTERN_CHARS_TO_ESCAPE = "\\.[]{}()*+-?^$|";
 
+    private static final Map<String, Pattern> PATTERNS = new HashMap<>();
+
     public static boolean match(List<String> patterns, File file) {
         return !match(patterns, file.getPath()).isEmpty();
     }
@@ -74,7 +78,7 @@ public static List<String> match(List<String> patterns, String name) {
     }
 
     public static boolean match(String pattern, String name) {
-        return buildPattern(pattern).matcher(name).matches();
+        return PATTERNS.computeIfAbsent(pattern, GoLangFileMatch::buildPattern).matcher(name).matches();
     }
 
     private static Pattern buildPattern(String pattern) {