Caching tuple1 objects

1 files changed, 15 insertions, 1 deletions

diff --git a/model-data/src/main/java/org/eclipse/viatra/solver/data/model/Tuple.java b/model-data/src/main/java/org/eclipse/viatra/solver/data/model/Tuple.java
index 4e7e7ba7..ca6548a4 100644
--- a/model-data/src/main/java/org/eclipse/viatra/solver/data/model/Tuple.java
+++ b/model-data/src/main/java/org/eclipse/viatra/solver/data/model/Tuple.java
@@ -1,13 +1,17 @@
 package org.eclipse.viatra.solver.data.model;
 
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
 
 public abstract class Tuple {
         private static final int CUSTOMTUPLESIZE = 2;
+        protected static final List<Tuple1> tuple1Cash = new ArrayList<>(1024);
         
         public abstract int getSize();
         public abstract int get(int element);
         public abstract int[] toArray();
+        
         @Override
         public String toString() {
                 StringBuilder b = new StringBuilder();
@@ -21,8 +25,18 @@ public abstract class Tuple {
                 b.append("]");
                 return b.toString();
         }
+        
         public static Tuple1 of1(int value) {
-                return new Tuple1(value);
+                if(value < tuple1Cash.size()) {
+                        return tuple1Cash.get(value);
+                } else {
+                        Tuple1 newlyCreated = null;
+                        while(value >= tuple1Cash.size()) {
+                                newlyCreated = new Tuple1(tuple1Cash.size());
+                                tuple1Cash.add(newlyCreated);
+                        }
+                        return newlyCreated;
+                }
         }
         
         public static Tuple of(int... values) {