From 0787bd9163690429f5c12c64eecba79922fd0943 Mon Sep 17 00:00:00 2001
From: Matthias Jaros <jarlucmat@mailbox.org>
Date: Mon, 9 Mar 2026 16:33:02 +0100
Subject: Changed result Queue to BitSet, which is more memory efficient

---
 src/main/java/com/it_jaros/networkScanner/Scanner.java | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'src/main/java/com/it_jaros/networkScanner/Scanner.java')

diff --git a/src/main/java/com/it_jaros/networkScanner/Scanner.java b/src/main/java/com/it_jaros/networkScanner/Scanner.java
index f5205d5..86e343d 100644
--- a/src/main/java/com/it_jaros/networkScanner/Scanner.java
+++ b/src/main/java/com/it_jaros/networkScanner/Scanner.java
@@ -6,9 +6,8 @@ import java.net.Socket;
 import java.net.SocketException;
 import java.net.SocketTimeoutException;
 import java.util.ArrayList;
+import java.util.BitSet;
 import java.util.List;
-import java.util.Queue;
-import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -63,7 +62,7 @@ public class Scanner {
     private ScanResult scanTarget(String target, String ports) {
         PortRange portRange = new PortRange(ports);
         AtomicLong portSlotFactory = new AtomicLong(System.nanoTime());
-        Queue<Integer> openPorts = new ConcurrentLinkedQueue<>();
+        BitSet openPorts = new BitSet(PortRange.MAX_PORT);
 
         Progress progress = new Progress(target, portRange.getTotal(), new AtomicInteger(), new AtomicInteger());
         progressBar.submit(progress);
@@ -79,7 +78,7 @@ public class Scanner {
                 try {
                     int port = f.get();
                     if (port != -1) {
-                        openPorts.add(port);
+                        openPorts.set(port);
                         progress.open().incrementAndGet();
                     }
                 } catch (InterruptedException | ExecutionException e) {
-- 
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