benchmarks

adding unordered_map vs. cheesemap bench

adds tidwall's hashmap

adds abseil bench

plotting the results

1 files changed, 55 insertions, 0 deletions

diff --git a/benches/CMakeLists.txt b/benches/CMakeLists.txt
new file mode 100644
index 0000000..d096f4b
--- /dev/null
+++ b/benches/CMakeLists.txt
@@ -0,0 +1,55 @@
+set(BENCHMARK_ENABLE_GTEST_TESTS OFF CACHE BOOL "" FORCE)
+set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
+set(BENCHMARK_USE_BUNDLED_GTEST OFF CACHE BOOL "" FORCE)
+
+add_subdirectory("${cm_benchesdir}/gbench" EXCLUDE_FROM_ALL)
+
+set(ABSL_PROPAGATE_CXX_STD ON CACHE BOOL "" FORCE)
+set(ABSL_BUILD_TESTING OFF CACHE BOOL "" FORCE)
+add_subdirectory("${cm_benchesdir}/abseil" EXCLUDE_FROM_ALL)
+
+set(cm_bench_targets
+  cheesemap_bench
+  tidwall_bench
+  unordered_map_bench
+  abseil_bench
+)
+
+foreach(target_name IN LISTS cm_bench_targets)
+  add_executable(${target_name} "${cm_benchesdir}/${target_name}.cpp")
+
+  target_include_directories(${target_name}
+    PRIVATE
+      "${cm_topdir}"
+      "${cm_benchesdir}"
+  )
+
+  target_compile_options(${target_name}
+    PRIVATE
+      -Wall -Wextra -Werror
+      $<$<BOOL:${CM_ENABLE_NATIVE}>:-march=native>
+  )
+
+  if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    target_compile_options(${target_name} PRIVATE -O3)
+  endif()
+
+  target_link_libraries(${target_name}
+    PRIVATE
+      benchmark::benchmark_main
+  )
+
+  set_target_properties(${target_name} PROPERTIES
+    CXX_STANDARD 20
+    CXX_STANDARD_REQUIRED ON
+    CXX_EXTENSIONS ON
+  )
+endforeach()
+
+target_link_libraries(cheesemap_bench PRIVATE cheesemap)
+
+set(cm_tidwalldir "${cm_benchesdir}/tidwall")
+target_include_directories(tidwall_bench PRIVATE "${cm_tidwalldir}")
+target_sources(tidwall_bench PRIVATE "${cm_tidwalldir}/hashmap.c")
+
+target_link_libraries(abseil_bench PRIVATE absl::flat_hash_map)