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Avoid unnecessary synchronization in QueryCache#queryContains #2298

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Avoid unnecessary synchronization in QueryCache#queryContains #2298

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0e936b5
Avoid unnecessary synchronization in QueryCache#queryContains
1wairesd Aug 3, 2026
4af237d
Use ConcurrentHashMap for inner QueryCache option map
1wairesd Aug 3, 2026
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10 changes: 10 additions & 0 deletions worldguard-core/src/main/java/com/sk89q/worldguard/protection/regions/QueryCache.java
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,16 @@ public ApplicableRegionSet queryContains(RegionManager manager, Location locatio
checkNotNull(option);

CacheKey key = new CacheKey(location);

// Fast path: avoid locking if the result is already cached
Map<QueryOption, ApplicableRegionSet> existing = cache.get(key);
if (existing != null) {
ApplicableRegionSet result = existing.get(option);
if (result != null) {
return result;
}
}

return cache.compute(key, (k, v) -> option.createCache(manager, location, v)).get(option);
}

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8 changes: 4 additions & 4 deletions worldguard-core/src/main/java/com/sk89q/worldguard/protection/regions/RegionQuery.java
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Original file line number Diff line number Diff line change
Expand Up @@ -45,11 +45,11 @@
import com.sk89q.worldguard.protection.util.RegionCollectionConsumer;

import java.util.Collection;
import java.util.EnumMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import javax.annotation.Nullable;

Expand Down Expand Up @@ -513,7 +513,7 @@ public List<ProtectedRegion> constructResult(Set<ProtectedRegion> applicable) {
@Override
Map<QueryOption, ApplicableRegionSet> createCache(RegionManager manager, Location location, Map<QueryOption, ApplicableRegionSet> cache) {
if (cache == null) {
cache = new EnumMap<>(QueryOption.class);
cache = new ConcurrentHashMap<>(QueryOption.values().length);
cache.put(QueryOption.NONE, manager.getApplicableRegions(location.toVector().toBlockPoint(), QueryOption.NONE));
}

Expand All @@ -530,7 +530,7 @@ Map<QueryOption, ApplicableRegionSet> createCache(RegionManager manager, Locatio
@Override
Map<QueryOption, ApplicableRegionSet> createCache(RegionManager manager, Location location, Map<QueryOption, ApplicableRegionSet> cache) {
if (cache == null) {
Map<QueryOption, ApplicableRegionSet> newCache = new EnumMap<>(QueryOption.class);
Map<QueryOption, ApplicableRegionSet> newCache = new ConcurrentHashMap<>(QueryOption.values().length);
ApplicableRegionSet result = manager.getApplicableRegions(location.toVector().toBlockPoint(), QueryOption.SORT);
newCache.put(QueryOption.NONE, result);
newCache.put(QueryOption.SORT, result);
Expand All @@ -551,7 +551,7 @@ Map<QueryOption, ApplicableRegionSet> createCache(RegionManager manager, Locatio
@Override
Map<QueryOption, ApplicableRegionSet> createCache(RegionManager manager, Location location, Map<QueryOption, ApplicableRegionSet> cache) {
if (cache == null) {
Map<QueryOption, ApplicableRegionSet> newCache = new EnumMap<>(QueryOption.class);
Map<QueryOption, ApplicableRegionSet> newCache = new ConcurrentHashMap<>(QueryOption.values().length);
ApplicableRegionSet noParResult = manager.getApplicableRegions(location.toVector().toBlockPoint(), QueryOption.NONE);
Set<ProtectedRegion> noParRegions = noParResult.getRegions();
Set<ProtectedRegion> regions = new HashSet<>();
Expand Down