jpountz commented on a change in pull request #430:
URL: https://github.com/apache/lucene/pull/430#discussion_r749462492
##########
File path: lucene/core/src/java/org/apache/lucene/util/IntroSelector.java
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@@ -185,6 +204,115 @@ private void shuffle(int from, int to) {
}
}
+ /** Selects the k-th entry with a bottom-k algorithm, given that k is close
to {@code from}. */
Review comment:
Interesting. When I raised this question, I had more in mind borrowing
ideas from interpolation search
(https://en.wikipedia.org/wiki/Binary_search_algorithm#Interpolation_search)
and e.g. see if picking the lowest of the 3 medians when `k-from < (to - from)
/ 8` and the highest of the 3 medians when `to-k < (to - from) / 8)` makes
things any faster.
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