From 5f4ea9ac5dd50dadd6523909c458be5452b2ff55 Mon Sep 17 00:00:00 2001
From: Michael Peter Christen <mc@yacy.net>
Date: Sat, 25 May 2024 01:10:23 +0200
Subject: [PATCH] reduced memory amount for network image reduced also the
 number of memory allocation for image storage

---
 source/net/yacy/visualization/RasterPlotter.java | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/source/net/yacy/visualization/RasterPlotter.java b/source/net/yacy/visualization/RasterPlotter.java
index 9bf29d206..2bac51836 100644
--- a/source/net/yacy/visualization/RasterPlotter.java
+++ b/source/net/yacy/visualization/RasterPlotter.java
@@ -929,9 +929,9 @@ public class RasterPlotter {
     
     public ByteBuffer exportPng() {
         try {
-            final ByteBuffer baos = new ByteBuffer();
-            byte[] pngbytes = pngEncode(1);
+            byte[] pngbytes = pngEncode(9);
             if (pngbytes == null) return null;
+            final ByteBuffer baos = new ByteBuffer(pngbytes.length);
             baos.write(pngbytes);
             baos.flush();
             baos.close();
@@ -1000,7 +1000,7 @@ public class RasterPlotter {
         final int height = image.getHeight(null);
 
         final Deflater scrunch = new Deflater(compressionLevel);
-        ByteBuffer outBytes = new ByteBuffer(1024);
+        ByteBuffer outBytes = new ByteBuffer(1024 * 300); // avoid frequent resizing of the ByteBuffer
         final OutputStream compBytes = new BufferedOutputStream(new DeflaterOutputStream(outBytes, scrunch, 2048, false), 16384);
         int i = 0;
         for (int row = 0; row < height; row++) {