optimizations for bufferedindexinput
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Key: LUCENE-2824
URL: https://issues.apache.org/jira/browse/LUCENE-2824
Project: Lucene - Java
Issue Type: Improvement
Affects Versions: 3.1, 4.0
Reporter: Robert Muir
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)
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