Java tip: How to read files quickly

http://nadeausoftware.com/articles/2008/02/java_tip_how_read_files_quickly

For the best Java read performance, there are four things to remember:

• Minimize I/O operations by reading an array at a time, not a byte at a time. An 8Kbyte array is a good size.
• Minimize method calls by getting data an array at a time, not a byte at a time. Use array indexing to get at bytes in the array.
• Minimize thread synchronization locks if you don't need thread safety. Either make fewer method calls to a thread-safe class, or use a non-thread-safe class like FileChannel and MappedByteBuffer.
• Minimize data copying between the JVM/OS, internal buffers, and application arrays. Use FileChannel with memory mapping, or a direct or wrapped array ByteBuffer

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