JBossDeveloper

I am thinking the slow bit is the regex parsing so doing those steps in parallel might give you an indication of whether splitting up the work will help. It should be a quick test to give you a rough idea of whether it is worthwhile re-architecting how you are doing the parsing. So something along the following lines:

public class NTA {
  private static Pattern ingWords = Pattern.compile(".*ing");

 public static void main(String[] args) throws Exception {
   String words = "/usr/share/dict/words";

    try (Stream<String> stream = Files.lines(Paths.get(words))) {
      stream.parallel()
        .filter(NTA::wordMatch)
        .collect(Collectors.toList())
        .forEach(k -> System.out.printf("%s\n", k));
   }
 }

 private static boolean wordMatch(String s) { return ingWords.matcher(s).matches(); }
}

Thanks Mike and it is a nice example ! Yuan, can you try this in the filter handlers ?

currently we are working on the [NTA-89] Add a keyword filter - JBoss Issue Tracker and we want to ignore these lines which contains the keywords in the filter.properties. It could improve that we don't need to parse the lines.