diff --git a/tests/performance/CMakeLists.txt b/tests/performance/CMakeLists.txt
index b8a9a5c..bc366c6 100644
--- a/tests/performance/CMakeLists.txt
+++ b/tests/performance/CMakeLists.txt
@@ -7,6 +7,8 @@ set(tests
   pi-dump-trg
   quicksort-dump-trg
   vector_add-dump-trg
+  data_item_get
+  data_item_get_invariant
 )
 
 foreach(test ${tests})
diff --git a/tests/performance/data_item_get.cpp b/tests/performance/data_item_get.cpp
new file mode 100644
index 0000000..89fd05c
--- /dev/null
+++ b/tests/performance/data_item_get.cpp
@@ -0,0 +1,136 @@
+/**
+ * ------------------------ Auto-generated Code ------------------------
+ *           This code was generated by the Insieme Compiler
+ * ---------------------------------------------------------------------
+ */
+#include <alloca.h>
+#include <allscale/api/user/data/static_grid.h>
+#include <allscale/data_item_server.hpp>
+#include <allscale/runtime.hpp>
+#include <allscale/no_split.hpp>
+#include <allscale/utils/vector.h>
+#include <iostream>
+#include <stdbool.h>
+#include <stdint.h>
+
+/* ------- Program Code --------- */
+
+ALLSCALE_REGISTER_TREETURE_TYPE(int32_t)
+using data_item_type_1 = allscale::api::user::data::StaticGrid<double, 200, 200 >;
+REGISTER_DATAITEMSERVER_DECLARATION(data_item_type_1)
+REGISTER_DATAITEMSERVER(data_item_type_1)
+
+struct main_name {
+    static const char* name() { return "__wi_main"; }
+};
+
+struct main_process;
+
+using main_work = allscale::work_item_description<
+    int32_t,
+    main_name,
+    allscale::no_serialization,
+    allscale::no_split<int32_t>,
+    main_process>;
+
+/* ------- Function Definitions --------- */
+int32_t main(int argc, char** argv) {
+    return allscale::runtime::main_wrapper<main_work >(argc, argv);
+}
+
+/* ------- Function Definitions --------- */
+int32_t IMP_main() {
+}
+/* ------- Function Definitions --------- */
+struct main_process {
+    static allscale::treeture<int32_t > execute(hpx::util::tuple< > const&)
+    {
+        using allscale::runtime::DataItemReference;
+        using allscale::runtime::DataItemManager;
+        using allscale::api::user::data::StaticGrid;
+        using allscale::api::user::data::StaticGridRegion;
+        using allscale::utils::Vector;
+        const int32_t var_0 = 200;
+        const int32_t var_1 = 10;
+        const double var_2 = 1.0E-3;
+        DataItemReference<StaticGrid<double, 200, 200 > > var_3 =
+            DataItemManager::create<StaticGrid<double, 200, 200 > >();
+        DataItemReference<StaticGrid<double, 200, 200 > > var_4 =
+            DataItemManager::create<StaticGrid<double, 200, 200 > >();
+        DataItemReference<StaticGrid<double, 200, 200 > >& var_5 = var_3;
+
+        hpx::util::high_resolution_timer timer;
+
+        auto lease1 = allscale::data_item_manager::acquire<StaticGrid<double, 200, 200 >>(
+            allscale::createDataItemRequirement(
+                var_3,
+                StaticGridRegion<2>(200, 200),
+                allscale::access_mode::ReadWrite)
+        );
+
+        auto lease2 = allscale::data_item_manager::acquire<StaticGrid<double, 200, 200 >>(
+            allscale::createDataItemRequirement(
+                var_4,
+                StaticGridRegion<2>(200, 200),
+                allscale::access_mode::ReadWrite)
+        );
+
+        int32_t var_6 = 0;
+        while (var_6 < var_0)
+        {
+            int32_t var_7 = 0;
+            while (var_7 < var_0) {
+                {
+                    DataItemManager::get(var_5)[Vector<long, 2>(var_6, var_7)] = 0.;
+                    if (var_6 == var_0 / 2 && var_7 == var_0 /2)
+                    {
+                        DataItemManager::get(var_5)[Vector<long, 2>(var_6, var_7)] = 100.;
+                    }
+                };
+                var_7++;
+            };
+            var_6++;
+        }
+        for (int32_t var_8 = 0; var_8 < var_1; ++var_8)
+        {
+            DataItemReference<StaticGrid<double, 200, 200>>& var_9 = var_3;
+            DataItemReference<StaticGrid<double, 200, 200>>& var_10 = var_4;
+            int32_t var_11 = 1;
+            while (var_11 < var_0 - 1)
+            {
+                int32_t var_12 = 1;
+                while (var_12 < var_0 - 1)
+                {
+                    DataItemManager::get(var_10)[Vector<long, 2 >(var_11, var_12)] =
+                        DataItemManager::get(var_9)[Vector<long, 2 >(var_11, var_12)] +
+                        var_2 * (
+                            DataItemManager::get(var_9)[Vector<long, 2>(var_11 - 1, var_12)] +
+                            DataItemManager::get(var_9)[Vector<long, 2>(var_11 + 1, var_12)] +
+                            DataItemManager::get(var_9)[Vector<long, 2>(var_11, var_12 - 1)] +
+                            DataItemManager::get(var_9)[Vector<long, 2>(var_11, var_12 + 1)] +
+                            -4. * DataItemManager::get(var_9)[Vector<long, 2>(var_11, var_12)]);
+                    var_12++;
+                }
+                var_11++;
+            }
+            if (var_8 % (var_1 / 10) == 0)
+            {
+                std::cout << "t=" << var_8 << " - center: " <<
+                    DataItemManager::get(var_10)[Vector<long, 2 >(var_0 / 2, var_0 / 2)] <<
+                    std::endl;
+            }
+            std::swap(var_3, var_4);
+        }
+        allscale::data_item_manager::release(lease1);
+        allscale::data_item_manager::release(lease2);
+        double elapsed = timer.elapsed();
+
+        std::cout << "t=" << var_1 << " - center: " <<
+            DataItemManager::get(var_5)[Vector<long, 2 >(var_0 / 2, var_0 / 2)] <<
+            std::endl;
+        std::cout << "Elapsed time: " << elapsed << '\n';
+        return allscale::make_ready_treeture(
+            DataItemManager::get(var_5)[Vector<long, 2 >(var_0 / 2, var_0 / 2)] < 100. ? 0 : 1);
+    }
+    static constexpr bool valid = true;
+};
diff --git a/tests/performance/data_item_get_invariant.cpp b/tests/performance/data_item_get_invariant.cpp
new file mode 100644
index 0000000..1abc534
--- /dev/null
+++ b/tests/performance/data_item_get_invariant.cpp
@@ -0,0 +1,137 @@
+/**
+ * ------------------------ Auto-generated Code ------------------------
+ *           This code was generated by the Insieme Compiler
+ * ---------------------------------------------------------------------
+ */
+#include <alloca.h>
+#include <allscale/api/user/data/static_grid.h>
+#include <allscale/data_item_server.hpp>
+#include <allscale/runtime.hpp>
+#include <allscale/no_split.hpp>
+#include <allscale/utils/vector.h>
+#include <iostream>
+#include <stdbool.h>
+#include <stdint.h>
+
+/* ------- Program Code --------- */
+
+ALLSCALE_REGISTER_TREETURE_TYPE(int32_t)
+using data_item_type_1 = allscale::api::user::data::StaticGrid<double, 200, 200 >;
+REGISTER_DATAITEMSERVER_DECLARATION(data_item_type_1)
+REGISTER_DATAITEMSERVER(data_item_type_1)
+
+struct main_name {
+    static const char* name() { return "__wi_main"; }
+};
+
+struct main_process;
+
+using main_work = allscale::work_item_description<
+    int32_t,
+    main_name,
+    allscale::no_serialization,
+    allscale::no_split<int32_t>,
+    main_process>;
+
+/* ------- Function Definitions --------- */
+int32_t main(int argc, char** argv) {
+    return allscale::runtime::main_wrapper<main_work >(argc, argv);
+}
+
+/* ------- Function Definitions --------- */
+int32_t IMP_main() {
+}
+/* ------- Function Definitions --------- */
+struct main_process {
+    static allscale::treeture<int32_t > execute(hpx::util::tuple< > const&)
+    {
+        using allscale::runtime::DataItemReference;
+        using allscale::runtime::DataItemManager;
+        using allscale::api::user::data::StaticGrid;
+        using allscale::api::user::data::StaticGridRegion;
+        using allscale::utils::Vector;
+        const int32_t var_0 = 200;
+        const int32_t var_1 = 10;
+        const double var_2 = 1.0E-3;
+        DataItemReference<StaticGrid<double, 200, 200 > > var_3 =
+            DataItemManager::create<StaticGrid<double, 200, 200 > >();
+        DataItemReference<StaticGrid<double, 200, 200 > > var_4 =
+            DataItemManager::create<StaticGrid<double, 200, 200 > >();
+        DataItemReference<StaticGrid<double, 200, 200 > >& var_5 = var_3;
+
+        hpx::util::high_resolution_timer timer;
+
+        auto lease1 = allscale::data_item_manager::acquire<StaticGrid<double, 200, 200 >>(
+            allscale::createDataItemRequirement(
+                var_3,
+                StaticGridRegion<2>(200, 200),
+                allscale::access_mode::ReadWrite)
+        );
+
+        auto lease2 = allscale::data_item_manager::acquire<StaticGrid<double, 200, 200 >>(
+            allscale::createDataItemRequirement(
+                var_4,
+                StaticGridRegion<2>(200, 200),
+                allscale::access_mode::ReadWrite)
+        );
+
+        int32_t var_6 = 0;
+        auto f_var_5 = DataItemManager::get(var_5);
+        while (var_6 < var_0)
+        {
+            int32_t var_7 = 0;
+            while (var_7 < var_0) {
+                {
+                    f_var_5[Vector<long, 2>(var_6, var_7)] = 0.;
+                    if (var_6 == var_0 / 2 && var_7 == var_0 /2)
+                    {
+                        f_var_5[Vector<long, 2>(var_6, var_7)] = 100.;
+                    }
+                };
+                var_7++;
+            };
+            var_6++;
+        }
+        for (int32_t var_8 = 0; var_8 < var_1; ++var_8)
+        {
+            auto var_9 = DataItemManager::get(var_3);
+            auto var_10 = DataItemManager::get(var_4);
+            int32_t var_11 = 1;
+            while (var_11 < var_0 - 1)
+            {
+                int32_t var_12 = 1;
+                while (var_12 < var_0 - 1)
+                {
+                    var_10[Vector<long, 2 >(var_11, var_12)] =
+                        var_9[Vector<long, 2 >(var_11, var_12)] +
+                        var_2 * (
+                            var_9[Vector<long, 2>(var_11 - 1, var_12)] +
+                            var_9[Vector<long, 2>(var_11 + 1, var_12)] +
+                            var_9[Vector<long, 2>(var_11, var_12 - 1)] +
+                            var_9[Vector<long, 2>(var_11, var_12 + 1)] +
+                            -4. * var_9[Vector<long, 2>(var_11, var_12)]);
+                    var_12++;
+                }
+                var_11++;
+            }
+            if (var_8 % (var_1 / 10) == 0)
+            {
+                std::cout << "t=" << var_8 << " - center: " <<
+                    var_10[Vector<long, 2 >(var_0 / 2, var_0 / 2)] <<
+                    std::endl;
+            }
+            std::swap(var_3, var_4);
+        }
+        allscale::data_item_manager::release(lease1);
+        allscale::data_item_manager::release(lease2);
+        double elapsed = timer.elapsed();
+
+        std::cout << "t=" << var_1 << " - center: " <<
+            DataItemManager::get(var_5)[Vector<long, 2 >(var_0 / 2, var_0 / 2)] <<
+            std::endl;
+        std::cout << "Elapsed time: " << elapsed << '\n';
+        return allscale::make_ready_treeture(
+            DataItemManager::get(var_5)[Vector<long, 2 >(var_0 / 2, var_0 / 2)] < 100. ? 0 : 1);
+    }
+    static constexpr bool valid = true;
+};