Use Default Buffer Size of 8K Bytes

[belugabehr]

Default buffer size is 8000 bytes which is not a power of 2. Update size to align with Java's default buffer size: 8192. The smaller buffers should be 2kb: 2048.

I've always heard that this number was chosen to be an multiple of disk sector size (4kb).

https://github.com/FasterXML/jackson-core/blob/02efa0a46f65c70e7741048a055765c9f89dc565/src/main/java/com/fasterxml/jackson/core/util/BufferRecycler.java#L80

• https://github.com/openjdk/jdk/blob/9a9add8825a040565051a09010b29b099c2e7d49/jdk/src/share/classes/java/io/BufferedInputStream.java#L53
• https://en.wikipedia.org/wiki/Disk_sector