jpountz commented on code in PR #15116:
URL: https://github.com/apache/lucene/pull/15116#discussion_r2296730558
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lucene/core/src/java/org/apache/lucene/util/GroupVIntUtil.java:
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@@ -64,6 +66,42 @@ public static void readGroupVInt(DataInput in, int[] dst,
int offset) throws IOE
final int n3Minus1 = (flag >> 2) & 0x03;
final int n4Minus1 = flag & 0x03;
+ // if our DataInput implements RandomAccessInput for absolute access and
IndexInput for seeking,
+ // we use a branch-less implementation:
+ if (in instanceof RandomAccessInput rin && in instanceof IndexInput iin) {
+ long pos = iin.getFilePointer();
+ if (iin.length() - pos >= MAX_LENGTH_PER_GROUP) {
Review Comment:
Maybe do `4 × Integer.BYTES` instead of the constant?
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