Fixed #539 (max recyclable chunk length reduction)

Author: cowtowncoder

release-notes/VERSION-2.x

@@ -31,6 +31,7 @@ JSON library.
 #508: Add new exception type `InputCoercionException` to be used for failed coercions
   like overflow for `int`
 #527: Add simple module-info for JDK9+, using Moditect
+#539: Reduce max size of recycled byte[]/char[] blocks by `TextBuffer`, `ByteArrayBuilder`
 
 2.9.9 (16-May-2019)
 

src/main/java/com/fasterxml/jackson/core/util/ByteArrayBuilder.java

@@ -33,10 +33,10 @@ public final class ByteArrayBuilder extends OutputStream
     // Size of the first block we will allocate.
     private final static int INITIAL_BLOCK_SIZE = 500;
 
-    // Maximum block size we will use for individual non-aggregated
-    // blocks. Let's limit to using 256k chunks.
-    private final static int MAX_BLOCK_SIZE = (1 << 18);
-    
+    // Maximum block size we will use for individual non-aggregated blocks.
+    // For 2.10, let's limit to using 128k chunks (was 256k up to 2.9)
+    private final static int MAX_BLOCK_SIZE = (1 << 17);
+
     final static int DEFAULT_BLOCK_ARRAY_SIZE = 40;
 
     // Optional buffer recycler instance that we can use for allocating the first block.

src/main/java/com/fasterxml/jackson/core/util/TextBuffer.java

@@ -34,10 +34,10 @@ public final class TextBuffer
     final static int MIN_SEGMENT_LEN = 1000;
 
     /**
-     * Let's limit maximum segment length to something sensible
-     * like 256k
+     * Let's limit maximum segment length to something sensible.
+     * For 2.10, let's limit to using 64kc chunks (128 kB) -- was 256kC/512kB up to 2.9
      */
-    final static int MAX_SEGMENT_LEN = 0x40000;
+    final static int MAX_SEGMENT_LEN = 0x10000;
 
     /*
     /**********************************************************