Add benchmark

src/benchmarks/CMakeLists.txt

@@ -1,5 +1,6 @@
 file(GLOB RTreeBenchmarkSources static_rtree.cpp)
 file(GLOB MatchBenchmarkSources match.cpp)
+file(GLOB AliasBenchmarkSources alias.cpp)
 
 add_executable(rtree-bench
 	EXCLUDE_FROM_ALL
@@ -26,7 +27,18 @@ target_link_libraries(match-bench
 	${CMAKE_THREAD_LIBS_INIT}
 	${TBB_LIBRARIES})
 
+add_executable(alias-bench
+	EXCLUDE_FROM_ALL
+    ${AliasBenchmarkSources}
+	$<TARGET_OBJECTS:UTIL>)
+
+target_link_libraries(alias-bench
+	${BOOST_BASE_LIBRARIES}
+	${CMAKE_THREAD_LIBS_INIT}
+	${TBB_LIBRARIES})
+
 add_custom_target(benchmarks
 	DEPENDS
 	rtree-bench
-	match-bench)
+	match-bench
+    alias-bench)

src/benchmarks/alias.cpp

@@ -0,0 +1,123 @@
+#include "util/alias.hpp"
+#include "util/integer_range.hpp"
+#include "util/log.hpp"
+#include "util/timing_util.hpp"
+
+#include <algorithm>
+#include <numeric>
+#include <random>
+#include <string>
+#include <vector>
+#include <iomanip>
+
+using namespace osrm;
+
+namespace tag
+{
+struct interger_alias
+{
+};
+struct double_alias
+{
+};
+}
+
+int main(int, char **)
+{
+    util::LogPolicy::GetInstance().Unmute();
+
+    auto num_rounds = 1000;
+    auto num_entries = 1000000;
+
+    std::vector<std::size_t> indices(num_entries);
+    std::iota(indices.begin(), indices.end(), 0);
+    std::mt19937 g(1337);
+    std::shuffle(indices.begin(), indices.end(), g);
+
+    using osrm_uint32 = Alias<std::uint32_t, tag::interger_alias>;
+    std::vector<osrm_uint32> aliased_uint32(num_entries);
+    std::vector<std::uint32_t> plain_uint32(num_entries);
+
+    using osrm_double = Alias<double, tag::double_alias>;
+    std::vector<osrm_double> aliased_double(num_entries);
+    std::vector<double> plain_double(num_entries);
+
+    std::iota(aliased_uint32.begin(), aliased_uint32.end(), osrm_uint32{0});
+    std::iota(plain_uint32.begin(), plain_uint32.end(), 0);
+    std::iota(aliased_double.begin(), aliased_double.end(), osrm_double{1.0});
+    std::iota(plain_double.begin(), plain_double.end(), 1.0);
+
+    TIMER_START(aliased_u32);
+    for (auto round : util::irange(0, num_rounds))
+    {
+        osrm_uint32 sum{0};
+        osrm_uint32 mult{1};
+        for (auto idx : indices)
+        {
+            sum += aliased_uint32[idx];
+            mult *= aliased_uint32[idx];
+        }
+        if (sum != osrm_uint32{1783293664})
+            return EXIT_FAILURE;
+        if (mult != osrm_uint32{0})
+            return EXIT_FAILURE;
+    }
+    TIMER_STOP(aliased_u32);
+    util::Log() << "aliased u32: " << TIMER_MSEC(aliased_u32);
+
+    TIMER_START(plain_u32);
+    for (auto round : util::irange(0, num_rounds))
+    {
+        std::uint32_t sum{0};
+        std::uint32_t mult{1};
+        for (auto idx : indices)
+        {
+            sum += plain_uint32[idx];
+            mult *= plain_uint32[idx];
+        }
+        if (sum != 1783293664)
+            return EXIT_FAILURE;
+        if (mult != 0)
+            return EXIT_FAILURE;
+    }
+    TIMER_STOP(plain_u32);
+    util::Log() << "plain u32: " << TIMER_MSEC(plain_u32);
+
+    TIMER_START(aliased_double);
+    for (auto round : util::irange(0, num_rounds))
+    {
+        osrm_double sum{0.0};
+        osrm_double mult{1.0};
+        for (auto idx : indices)
+        {
+            sum += aliased_double[idx];
+            mult *= aliased_double[idx];
+        }
+
+        if (sum != osrm_double{500000500000})
+            return EXIT_FAILURE;
+        if (mult != osrm_double{std::numeric_limits<double>::infinity()})
+            return EXIT_FAILURE;
+    }
+    TIMER_STOP(aliased_double);
+    util::Log() << "aliased double: " << TIMER_MSEC(aliased_double);
+
+    TIMER_START(plain_double);
+    for (auto round : util::irange(0, num_rounds))
+    {
+        double sum{0.0};
+        double mult{1.0};
+        for (auto idx : indices)
+        {
+            sum += plain_double[idx];
+            mult *= plain_double[idx];
+        }
+
+        if (sum != 500000500000)
+            return EXIT_FAILURE;
+        if (mult != std::numeric_limits<double>::infinity())
+            return EXIT_FAILURE;
+    }
+    TIMER_STOP(plain_double);
+    util::Log() << "plain double: " << TIMER_MSEC(plain_double);
+}