Improved performance of UriParser#extractScheme (#614)

* Improved performance of UriParser.normalisePath

* Improved performance of UriParser.extractScheme

* Aligned measurement with master branch

* Keep the same line feed

* Revert "Keep the same line feed"

This reverts commit 3d22ccf.

* Improved performance of UriParser#extractScheme

* Improved performance of UriParser#extractScheme

Author: japplis

commons-vfs2/src/main/java/org/apache/commons/vfs2/provider/UriParser.java

@@ -434,7 +434,7 @@ public static String extractScheme(final String[] schemes, final String uri, fin
             buffer.append(uri);
         }
         for (final String scheme : schemes) {
-            if (uri.startsWith(scheme + ":")) {
+            if (uri.startsWith(scheme) && uri.length() > scheme.length() && uri.charAt(scheme.length()) == ':') {
                 if (buffer != null) {
                     buffer.delete(0, uri.indexOf(':') + 1);
                 }

commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/UriParserBenchmark.java

@@ -29,6 +29,7 @@
 public class UriParserBenchmark {
 
     private static final String PATH_TO_NORMALIZE = "file:///this/../is/a%2flong%2Fpath/./for testing/normlisePath%2fmethod.txt";
+    private static final String[] SCHEMES = {"file", "ftp", "ftps", "webdav", "temp", "ram", "http", "https", "sftp", "zip", "jar", "tgz", "gz"};
     private static final String PATH_TO_ENCODE = "file:///this/is/path/to/encode/for/testing/encode.perf";
     private static final char[] ENCODE_RESERVED = new char[] {' ', '#'};
 
@@ -40,6 +41,10 @@ public void normalisePath() throws FileSystemException {
     }
 
     @Benchmark
+    public void extractScheme() throws FileSystemException {
+        UriParser.extractScheme(SCHEMES, PATH_TO_NORMALIZE);
+    }
+
     public void encode() throws FileSystemException {
         UriParser.encode(PATH_TO_ENCODE, ENCODE_RESERVED);
     }