[LUCENE-1121] Use nio.transferTo when copying large blocks of bytes

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Component/s: core/store
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Michael McCandless
• Created: 07/Jan/08 16:53
• Updated: 28/Aug/22 11:44
• Resolved: 20/Jan/08 17:16

Description

When building a CFS file, and also when merging stored fields (and
term vectors, with LUCENE-1120), we copy large blocks of bytes at
once.

We currently do this with an intermediate buffer.

But, nio.transferTo should be somewhat faster on OS's that offer low
level IO APIs for moving blocks of bytes between files.