diff --git a/build/CMakeLists.txt b/build/CMakeLists.txt
index 7440170..b69cc57 100644
--- a/build/CMakeLists.txt
+++ b/build/CMakeLists.txt
@@ -5,7 +5,7 @@ add_compile_definitions(__IPC_LIBRARY__)
 if(MSVC)
   add_compile_options("/std:c++17")
 else()
-  add_compile_options("-std=gnu++1z")
+  add_compile_options("-std=gnu++1z -O2")
 endif()
 
 include_directories("../include")
diff --git a/build/test.pro b/build/test.pro
index 5fc56f4..111e347 100644
--- a/build/test.pro
+++ b/build/test.pro
@@ -24,7 +24,8 @@ SOURCES += \
     ../test/main.cpp \
     ../test/test_shm.cpp \
     ../test/test_circ.cpp \
-    ../test/test_ipc.cpp
+    ../test/test_ipc.cpp \
+    ../test/test_mem.cpp
 
 LIBS += \
     -L$${DESTDIR} -lipc
diff --git a/src/memory/resource.hpp b/src/memory/resource.hpp
index 152bcb9..3de049b 100644
--- a/src/memory/resource.hpp
+++ b/src/memory/resource.hpp
@@ -16,14 +16,14 @@ namespace mem {
 namespace detail {
 
 template <typename F, typename D>
-constexpr decltype(auto) switch_constexpr(std::size_t /*i*/, std::index_sequence<>, F&& /*f*/, D&& def) {
+constexpr decltype(auto) static_switch(std::size_t /*i*/, std::index_sequence<>, F&& /*f*/, D&& def) {
     return def();
 }
 
 template <typename F, typename D, std::size_t N, std::size_t...I>
-constexpr decltype(auto) switch_constexpr(std::size_t i, std::index_sequence<N, I...>, F&& f, D&& def) {
+constexpr decltype(auto) static_switch(std::size_t i, std::index_sequence<N, I...>, F&& f, D&& def) {
     return (i == N) ? f(std::integral_constant<size_t, N>{}) :
-                      switch_constexpr(i, std::index_sequence<I...>{}, f, def);
+                      static_switch(i, std::index_sequence<I...>{}, f, def);
 }
 
 } // namespace detail
@@ -40,7 +40,7 @@ private:
     static decltype(auto) choose(std::size_t size, F&& f) {
         enum : std::size_t { base_size = sizeof(void*) };
         size = ((size - 1) & (~(base_size - 1))) + base_size;
-        return detail::switch_constexpr(size, std::index_sequence<
+        return detail::static_switch(size, std::index_sequence<
             base_size     , base_size * 2 ,
             base_size * 3 , base_size * 4 ,
             base_size * 5 , base_size * 6 ,
diff --git a/test/test.h b/test/test.h
index 6e2b398..ff71177 100644
--- a/test/test.h
+++ b/test/test.h
@@ -40,11 +40,16 @@ struct test_stopwatch {
         }
     }
 
+    template <int Factor>
     void print_elapsed(int N, int M, int Loops) {
         auto ts = sw_.elapsed<std::chrono::microseconds>();
         std::cout << "[" << N << ":" << M << ", " << Loops << "] "
                   << "performance: " << (ts / 1000.0) << " ms, "
-                  << (double(ts) / double(Loops * N)) << " us/d" << std::endl;
+                  << (double(ts) / double(Factor ? (Loops * Factor) : (Loops * N))) << " us/d" << std::endl;
+    }
+
+    void print_elapsed(int N, int M, int Loops) {
+        print_elapsed<0>(N, M, Loops);
     }
 };
 
diff --git a/test/test_ipc.cpp b/test/test_ipc.cpp
index 7b81774..21c27c6 100644
--- a/test/test_ipc.cpp
+++ b/test/test_ipc.cpp
@@ -462,7 +462,7 @@ void Unit::test_channel() {
     std::thread t2 {[&] {
         ipc::channel cc { "my-ipc-channel" };
         cc.wait_for_recv(1);
-        for (std::size_t i = 0; i < (std::min)(100, LoopCount); ++i) {
+        for (std::size_t i = 0; i < static_cast<std::size_t>((std::min)(100, LoopCount)); ++i) {
             std::cout << "sending: " << i << "-[" << datas__[i].size() << "]" << std::endl;
             cc.send(datas__[i]);
         }
diff --git a/test/test_mem.cpp b/test/test_mem.cpp
new file mode 100644
index 0000000..5625b34
--- /dev/null
+++ b/test/test_mem.cpp
@@ -0,0 +1,166 @@
+#include <vector>
+#include <thread>
+#include <atomic>
+#include <cstddef>
+
+#include "random.hpp"
+
+#include "memory/resource.hpp"
+#include "test.h"
+
+namespace {
+
+class Unit : public TestSuite {
+    Q_OBJECT
+
+    const char* name() const {
+        return "test_mem";
+    }
+
+private slots:
+    void initTestCase();
+    void cleanupTestCase();
+
+    void test_alloc();
+} unit__;
+
+#include "test_mem.moc"
+
+constexpr int DataMin   = sizeof(void*);
+constexpr int DataMax   = sizeof(void*) * 16;
+constexpr int LoopCount = 1000000;
+
+std::vector<std::size_t> sizes__;
+
+template <typename M>
+struct alloc_ix_t {
+    static std::vector<int> ix_[2];
+    static bool inited_;
+};
+
+template <typename M>
+std::vector<int> alloc_ix_t<M>::ix_[2] = { std::vector<int>(LoopCount), std::vector<int>(LoopCount) };
+template <typename M>
+bool alloc_ix_t<M>::inited_ = false;
+
+struct alloc_random : alloc_ix_t<alloc_random> {
+    alloc_random() {
+        if (inited_) return;
+        inited_ = true;
+        capo::random<> rdm_index(0, LoopCount - 1);
+        for (int i = 0; i < LoopCount; ++i) {
+            ix_[0][static_cast<std::size_t>(i)] =
+            ix_[1][static_cast<std::size_t>(i)] = rdm_index();
+        }
+    }
+};
+
+struct alloc_LIFO : alloc_ix_t<alloc_LIFO> {
+    alloc_LIFO() {
+        if (inited_) return;
+        inited_ = true;
+        for (int i = 0, n = LoopCount - 1; i < LoopCount; ++i, --n) {
+            ix_[0][static_cast<std::size_t>(i)] =
+            ix_[1][static_cast<std::size_t>(n)] = i;
+        }
+    }
+};
+
+struct alloc_FIFO : alloc_ix_t<alloc_FIFO> {
+    alloc_FIFO() {
+        if (inited_) return;
+        inited_ = true;
+        for (int i = 0; i < LoopCount; ++i) {
+            ix_[0][static_cast<std::size_t>(i)] =
+            ix_[1][static_cast<std::size_t>(i)] = i;
+        }
+    }
+};
+
+void Unit::initTestCase() {
+    TestSuite::initTestCase();
+
+    capo::random<> rdm { DataMin, DataMax };
+    for (int i = 0; i < LoopCount; ++i) {
+        sizes__.emplace_back(static_cast<std::size_t>(rdm()));
+    }
+
+}
+
+void Unit::cleanupTestCase() {
+    sizes__.clear();
+}
+
+template <typename AllocT, typename ModeT, int ThreadsN>
+void benchmark_alloc() {
+    std::cout << std::endl
+              << "[Threads: " << ThreadsN << ", Mode: " << type_name<ModeT>() << "] "
+              << type_name<AllocT>() << std::endl;
+
+    std::vector<void*> ptrs[ThreadsN];
+    for (auto& vec : ptrs) {
+        vec.resize(LoopCount);
+    }
+    ModeT mode;
+
+    std::atomic_int fini { 0 };
+    test_stopwatch  sw;
+
+    std::thread works[ThreadsN];
+    int pid = 0;
+
+    for (auto& w : works) {
+        w = std::thread {[&, pid] {
+            sw.start();
+            for (std::size_t x = 0; x < 2; ++x) {
+                for(std::size_t n = 0; n < LoopCount; ++n) {
+                    int         m  = mode.ix_[x][n];
+                    void*    (& p) = ptrs[pid][static_cast<std::size_t>(m)];
+                    std::size_t s  = sizes__[static_cast<std::size_t>(m)];
+                    if (p == nullptr) {
+                        p = AllocT::alloc(s);
+                    }
+                    else {
+                        AllocT::free(p, s);
+                        p = nullptr;
+                    }
+                }
+            }
+            if (++fini == ThreadsN) {
+                sw.print_elapsed<1>(DataMin, DataMax, LoopCount);
+            }
+        }};
+        ++pid;
+    }
+    sw.start();
+
+    for (auto& w : works) w.join();
+}
+
+template <typename AllocT, typename ModeT, int ThreadsN>
+struct test_performance {
+    static void start() {
+        test_performance<AllocT, ModeT, ThreadsN - 1>::start();
+        benchmark_alloc<AllocT, ModeT, ThreadsN>();
+    }
+};
+
+template <typename AllocT, typename ModeT>
+struct test_performance<AllocT, ModeT, 1> {
+    static void start() {
+        benchmark_alloc<AllocT, ModeT, 1>();
+    }
+};
+
+void Unit::test_alloc() {
+    // malloc
+    test_performance<ipc::mem::static_alloc, alloc_random, 8>::start();
+    test_performance<ipc::mem::static_alloc, alloc_LIFO  , 8>::start();
+    test_performance<ipc::mem::static_alloc, alloc_FIFO  , 8>::start();
+    // pool-alloc
+    test_performance<ipc::mem::pool_alloc  , alloc_random, 8>::start();
+    test_performance<ipc::mem::pool_alloc  , alloc_LIFO  , 8>::start();
+    test_performance<ipc::mem::pool_alloc  , alloc_FIFO  , 8>::start();
+}
+
+} // internal-linkage