mikemccand commented on a change in pull request #923: LUCENE-8988: Introduce
Global Feature Based Early Termination For Sorted Fields
URL: https://github.com/apache/lucene-solr/pull/923#discussion_r335019419
##########
File path: lucene/core/src/java/org/apache/lucene/search/TopFieldCollector.java
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@@ -130,8 +130,25 @@ public void setScorer(Scorable scorer) throws IOException
{
public void collect(int doc) throws IOException {
++totalHits;
hitsThresholdChecker.incrementHitCount();
- if (queueFull) {
- if (collectedAllCompetitiveHits || reverseMul *
comparator.compareBottom(doc) <= 0) {
+
+ Object currentValue = null;
+
+ if (fieldValueChecker != null) {
+ try {
+ currentValue = comparator.getDocValue(doc);
+ } catch (UnsupportedOperationException e) {
+ fieldValueChecker.disableGlobalHitCheck();
+ }
+ }
+
+ boolean isHitGloballyCompetitive =
isHitGloballyCompetitive(currentValue, doc);
+
+ // There is a potential race condition here -- the hit may no longer
be competitive between the
+ // two checks. However, the tradeoff is performing the global check
twice -- which is expensive.
+ // Hence, the worst we can end up is an extra non competitive hit
+ if (queueFull || (isHitGloballyCompetitive == false)) {
+ if (collectedAllCompetitiveHits || (isHitGloballyCompetitive ==
false ||
Review comment:
Same here.
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