perf: decrease the overhead of constraint profiling (#2544)

Author: triceo

core/src/main/java/ai/timefold/solver/core/impl/bavet/common/ConstraintNodeProfileId.java

@@ -13,12 +13,12 @@
  * @param locationSet the set of locations where this constraint node is defined
  */
 @NullMarked
-public record ConstraintNodeProfileId(long key, StreamKind streamKind, Qualifier qualifier,
+public record ConstraintNodeProfileId(int key, StreamKind streamKind, Qualifier qualifier,
         SortedSet<ConstraintNodeLocation> locationSet)
         implements
             Comparable<ConstraintNodeProfileId> {
 
-    public ConstraintNodeProfileId(long key, StreamKind streamKind, SortedSet<ConstraintNodeLocation> locationSet) {
+    public ConstraintNodeProfileId(int key, StreamKind streamKind, SortedSet<ConstraintNodeLocation> locationSet) {
         this(key, streamKind, Qualifier.NONE, locationSet);
     }
 
@@ -31,12 +31,12 @@ public boolean equals(Object object) {
 
     @Override
     public int hashCode() {
-        return Long.hashCode(key);
+        return Integer.hashCode(key);
     }
 
     @Override
     public int compareTo(ConstraintNodeProfileId other) {
-        return Long.compare(key, other.key);
+        return Integer.compare(key, other.key);
     }
 
     @Override
@@ -64,7 +64,7 @@ public String toString() {
     public String toVerboseString() {
         var toString = toString();
         if (locationSet.size() == 1) {
-            var location = locationSet.iterator().next();
+            var location = locationSet.getFirst();
             return "%s defined at location %s".formatted(toString, location);
         }
         return "%s shared at locations %s".formatted(toString, locationSet);

core/src/main/java/ai/timefold/solver/core/impl/bavet/common/tuple/TupleLifecycle.java

@@ -66,7 +66,7 @@ static <Tuple_ extends Tuple> TupleLifecycle<Tuple_> recording() {
     }
 
     static <Stream_ extends BavetStream, Tuple_ extends Tuple> TupleLifecycle<Tuple_> profiling(
-            InnerConstraintProfiler constraintProfiler, long lifecycleId, Stream_ stream,
+            InnerConstraintProfiler constraintProfiler, int lifecycleId, Stream_ stream,
             TupleLifecycle<Tuple_> delegate) {
         if (delegate instanceof AggregatedTupleLifecycle) {
             // Do not profile aggregated tuple lifecycles; that will double

core/src/main/java/ai/timefold/solver/core/impl/score/stream/bavet/common/ConstraintNodeBuildHelper.java

@@ -45,7 +45,7 @@ public final class ConstraintNodeBuildHelper<Solution_, Score_ extends Score<Sco
     private final Map<BavetAbstractConstraintStream<Solution_>, List<Set<ConstraintNodeProfileId>>> streamToProfileIdSets;
     private final Map<BavetScoringConstraintStream<Solution_>, Scorer<?>> streamToScorers = new HashMap<>();
 
-    private long nextLifecycleProfilingId = 0;
+    private int nextLifecycleProfilingId = 0;
 
     public ConstraintNodeBuildHelper(ConsistencyTracker<Solution_> consistencyTracker,
             Set<BavetAbstractConstraintStream<Solution_>> activeStreamSet, AbstractScoreInliner<Score_> scoreInliner,