[LUCENE-2824] optimizations for bufferedindexinput

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1, 4.0-ALPHA
• Fix Version/s: 3.1, 4.0-ALPHA
• Lucene Fields: New, Patch Available
• Assignee: Robert Muir
• Reporter: Robert Muir
• Created: 19/Dec/10 11:36
• Updated: 28/Aug/22 12:38
• Resolved: 21/Jan/11 04:17

Description

along the same lines as LUCENE-2816:

• the readVInt/readVLong/readShort/readInt/readLong are not optimal here since they defer to readByte. for example this means checking the buffer's bounds per-byte in readVint instead of per-vint.
• its an easy win to speed this up, even for the vint case: its essentially always faster, the only slower case is 1024 single-byte vints in a row, in this case we would do a single extra bounds check (1025 instead of 1024)