On Sep 19, 2018, at 5:59 PM, Joe Wang <huizhe.w...@oracle.com> wrote:
> I'll do some performance testing for both cases, FileChannel/direct buffer > and possible checksum comparison, although, as you said, the later might not > work since we need to be 100%. The probability of false positives is likely > extremely low, but is not zero after all. I'll do the performance check any > ways just out of curiosity. But in many cases, checksum comparison may not be > faster than direct comparison, esp. in this case the API compares just two > files. Checksum values would be nice if there are multiple files to compare. I doubt the checksum test is worthwhile. It might be useful however to try FileChannel and direct byte buffers combined with ByteBuffer.mismatch() [1]. Thanks, Brian [1] https://download.java.net/java/early_access/jdk12/docs/api/java.base/java/nio/ByteBuffer.html#mismatch(java.nio.ByteBuffer)
