diff --git a/playground/CMakeLists.txt b/playground/CMakeLists.txt
index cde32018..506f5ca4 100644
--- a/playground/CMakeLists.txt
+++ b/playground/CMakeLists.txt
@@ -10,6 +10,7 @@ set(REAL_SRCS efunc_posits.cpp
 	 type_test.cpp
 	 float_to_decimal_string.cpp
 	 lazy_evaluation.cpp
+	 concurrency.cpp
 	 expression_templates.cpp
 )
 
diff --git a/playground/concurrency.cpp b/playground/concurrency.cpp
new file mode 100644
index 00000000..5f60e1f2
--- /dev/null
+++ b/playground/concurrency.cpp
@@ -0,0 +1,50 @@
+// https://en.cppreference.com/w/cpp/algorithm/execution_policy_tag
+
+#include <algorithm>
+#include <chrono>
+#include <cstdint>
+#include <iostream>
+#include <random>
+#include <vector>
+
+#define PARALLEL
+#ifdef PARALLEL
+#include <execution>
+    namespace execution = std::execution;
+#else
+    enum class execution { seq, unseq, par_unseq, par };
+#endif
+ 
+void measure([[maybe_unused]] auto policy, std::vector<std::uint64_t> v)
+{
+    const auto start = std::chrono::steady_clock::now();
+#ifdef PARALLEL
+    std::sort(policy, v.begin(), v.end());
+#else
+    std::sort(v.begin(), v.end());
+#endif
+    const auto finish = std::chrono::steady_clock::now();
+    std::cout << std::chrono::duration_cast<std::chrono::milliseconds>(finish - start)
+              << '\n';
+};
+ 
+int main()
+{
+    std::vector<std::uint64_t> v(1'000'000);
+    std::mt19937 gen {std::random_device{}()};
+    std::ranges::generate(v, gen);
+ /*
+  1M random uint64_t's 
+
+    83ms
+    74ms
+    12ms
+    12ms
+
+  on an 8 core machine
+ */
+    measure(execution::seq, v);
+    measure(execution::unseq, v);
+    measure(execution::par_unseq, v);
+    measure(execution::par, v);
+}
\ No newline at end of file