lordcheng10 edited a comment on pull request #3061:
URL: https://github.com/apache/bookkeeper/pull/3061#issuecomment-1042613806
in addition，I added the following logic to reduce unnecessary rehash:
@merlimat @hangc0276 @eolivelli
private void cleanBucket(int bucket) {
int nextInArray = (bucket + 4) & (table.length - 1);
if (table[nextInArray] == EmptyKey) {
table[bucket] = EmptyKey;
table[bucket + 1] = EmptyKey;
table[bucket + 2] = ValueNotFound;
table[bucket + 3] = ValueNotFound;
--usedBuckets;
// Reduce unnecessary rehash
bucket = (bucket - 4) & (table.length - 1);
while (table[bucket] == DeletedKey) {
table[bucket] = EmptyKey;
table[bucket + 1] = EmptyKey;
table[bucket + 2] = ValueNotFound;
table[bucket + 3] = ValueNotFound;
--usedBuckets;
bucket = (bucket - 4) & (table.length - 1);
}
} else {
table[bucket] = DeletedKey;
table[bucket + 1] = DeletedKey;
table[bucket + 2] = ValueNotFound;
table[bucket + 3] = ValueNotFound;
}
}
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