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Boost.Unordered aggregate benchmarks
Benchmarks
Aggregated benchmarks simulating real-life scenarios, provided as part of Boost.Unordered source code.
Detailed results
Folder
gcc-x64: GCC 11, x64clang-x64: Clang 12, x64vs-x64: Visual Studio 2019, x64clang-arm64: Clang 12 ARM64gcc-x86: GCC 11, x86clang-x86: Clang 12, x86vs-x86: Visual Studio 2019, x86
Summary results
GCC 11, x64
string.cpp
std::unordered_map: 32559 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 23524 ms, 245453904 bytes in 3999510 allocations
boost::unordered_flat_map: 12939 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 10152 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 12795 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 12374 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 35880 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 25951 ms, 245453904 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 14659 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 18169 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17790 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16592 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 31195 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 24115 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map: 12270 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 10150 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 12433 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 11405 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 34319 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 27104 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 13954 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17617 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17482 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16240 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 11408 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 9892 ms, 149424400 bytes in 5996682 allocations
boost::unordered_flat_map: 4957 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 8035 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 8765 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 6118 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 12188 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 10177 ms, 197477520 bytes in 6000002 allocations
boost::unordered_flat_map: 5123 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 8158 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 8831 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 6472 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 31742 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 26188 ms, 245477520 bytes in 6000002 allocations
boost::unordered_flat_map: 10893 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 16122 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 14684 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 12187 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 28534 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 21509 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map: 12282 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 14080 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 13545 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 11631 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 27971 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 20302 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map, FNV-1a: 11902 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 25344 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 14085 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 12069 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1294 ms, 3728 bytes in 114 allocations
boost::unordered_map: 702 ms, 4392 bytes in 115 allocations
boost::unordered_flat_map: 816 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 616 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 610 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 539 ms, 4352 bytes in 1 allocations
Clang 12, x64
string.cpp
std::unordered_map: 31792 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 24504 ms, 245453904 bytes in 3999510 allocations
boost::unordered_flat_map: 12595 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 11684 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 14309 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 14175 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 33741 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 23302 ms, 245453904 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 12219 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 16206 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16884 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16093 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 30734 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 24926 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map: 11691 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 11383 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 14145 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 13335 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 31177 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 24492 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 11651 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 16019 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16854 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15656 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 11250 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 9335 ms, 149424400 bytes in 5996682 allocations
boost::unordered_flat_map: 4610 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 7265 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 8660 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 5865 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 13074 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 9726 ms, 197477520 bytes in 6000002 allocations
boost::unordered_flat_map: 4953 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 7273 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 9074 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 6451 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 30056 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 25353 ms, 245477520 bytes in 6000002 allocations
boost::unordered_flat_map: 9404 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 14306 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 14450 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 11744 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 31521 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 23635 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map: 12531 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 16547 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 16588 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 14160 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 28732 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 22814 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map, FNV-1a: 12799 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 27661 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16609 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 14344 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1417 ms, 3728 bytes in 114 allocations
boost::unordered_map: 1014 ms, 4392 bytes in 115 allocations
boost::unordered_flat_map: 885 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 874 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 974 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 624 ms, 4352 bytes in 1 allocations
Visual Studio 2019, x64
string.cpp
std::unordered_map: 37879 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map: 39703 ms, 245453904 bytes in 3999510 allocations
boost::unordered_flat_map: 26012 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 17549 ms, 279707224 bytes in 2 allocations
absl::node_hash_map: 30188 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 31065 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 37672 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 38775 ms, 245453904 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 24299 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 24044 ms, 279707224 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 30603 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 31312 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 34623 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map: 40446 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map: 23893 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 16909 ms, 194667880 bytes in 2 allocations
absl::node_hash_map: 30099 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 29334 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 34633 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 39157 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 21883 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 22757 ms, 194667880 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 30142 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 28046 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 20804 ms, 278138072 bytes in 5996682 allocations
boost::unordered_map: 18756 ms, 149424400 bytes in 5996682 allocations
boost::unordered_flat_map: 10826 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 12680 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 17202 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 12704 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 25889 ms, 326217760 bytes in 6000002 allocations
boost::unordered_map: 19167 ms, 197477520 bytes in 6000002 allocations
boost::unordered_flat_map: 12367 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 11692 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 18802 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 15333 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 29232 ms, 374217768 bytes in 6000002 allocations
boost::unordered_map: 41098 ms, 245477520 bytes in 6000002 allocations
boost::unordered_flat_map: 15579 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 19740 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 29728 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 27032 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 33812 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map: 41311 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map: 26029 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 27397 ms, 54572488 bytes in 2 allocations
absl::node_hash_map: 43948 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 36549 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 34098 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map, FNV-1a: 39437 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map, FNV-1a: 23309 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 43073 ms, 54572488 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 34187 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 27239 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1329 ms, 11840 bytes in 115 allocations
boost::unordered_map: 2554 ms, 4392 bytes in 115 allocations
boost::unordered_flat_map: 2099 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 1125 ms, 4304 bytes in 2 allocations
absl::node_hash_map: 2609 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 2322 ms, 4352 bytes in 1 allocations
Clang 12, ARM64
string.cpp
std::unordered_map: 17389 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map: 17148 ms, 213457840 bytes in 3999510 allocations
boost::unordered_flat_map: 9900 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map: 8567 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 10188 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map: 8769 ms, 276824040 bytes in 1 allocations
std::unordered_map, FNV-1a: 21326 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 16105 ms, 213457840 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 8195 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10887 ms, 201326592 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 9289 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 8739 ms, 276824040 bytes in 1 allocations
string_view.cpp
std::unordered_map: 14099 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map: 13428 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map: 6288 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 6724 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 8236 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map: 7474 ms, 209715184 bytes in 1 allocations
std::unordered_map, FNV-1a: 20137 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 15709 ms, 181461776 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 7820 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10479 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 8969 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 8186 ms, 209715184 bytes in 1 allocations
uint32.cpp
std::unordered_map: 7779 ms, 196600184 bytes in 5996681 allocations
boost::unordered_map: 4700 ms, 149424400 bytes in 5996682 allocations
boost::unordered_flat_map: 2019 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 4072 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 3683 ms, 123470912 bytes in 5996681 allocations
absl::flat_hash_map: 2586 ms, 75497472 bytes in 1 allocations
uint64.cpp
std::unordered_map: 7776 ms, 244679864 bytes in 6000001 allocations
boost::unordered_map: 5101 ms, 197477520 bytes in 6000002 allocations
boost::unordered_flat_map: 2043 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 3689 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 4043 ms, 171497472 bytes in 6000001 allocations
absl::flat_hash_map: 3186 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 15131 ms, 292679864 bytes in 6000001 allocations
boost::unordered_map: 12493 ms, 245477520 bytes in 6000002 allocations
boost::unordered_flat_map: 4123 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 7612 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 6102 ms, 219497472 bytes in 6000001 allocations
absl::flat_hash_map: 5008 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 30645 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map: 33047 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map: 18695 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 21776 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 22171 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map: 19501 ms, 52428784 bytes in 1 allocations
std::unordered_map, FNV-1a: 29475 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 27910 ms, 58766384 bytes in 1418657 allocations
boost::unordered_flat_map, FNV-1a: 18183 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 35638 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 20023 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 19052 ms, 52428784 bytes in 1 allocations
word_size.cpp
std::unordered_map: 978 ms, 5192 bytes in 114 allocations
boost::unordered_map: 1676 ms, 4392 bytes in 115 allocations
boost::unordered_flat_map: 1481 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 1338 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 1111 ms, 4112 bytes in 114 allocations
absl::flat_hash_map: 1128 ms, 4344 bytes in 1 allocations
GCC 11, x86
string.cpp
std::unordered_map: 33469 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 24832 ms, 156295880 bytes in 3999510 allocations
boost::unordered_flat_map: 17102 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 28400 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 18531 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 18481 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 37496 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 28179 ms, 156295880 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 18948 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21621 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 19627 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 19467 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 28149 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 23187 ms, 92303752 bytes in 3999510 allocations
boost::unordered_flat_map: 15525 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 25231 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 17425 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 16780 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 32338 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 26770 ms, 92303752 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 16864 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 19932 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18030 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 17294 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 10967 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 11266 ms, 100271784 bytes in 5996682 allocations
boost::unordered_flat_map: 8752 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 12376 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 14069 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 11980 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 17855 ms, 148311624 bytes in 6000002 allocations
boost::unordered_flat_map: 11028 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 17405 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 15048 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 13330 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 33701 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 30980 ms, 196311624 bytes in 6000002 allocations
boost::unordered_flat_map: 16350 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 20501 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 20563 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 19100 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2026 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 1986 ms, 7434104 bytes in 354034 allocations
boost::unordered_flat_map: 1354 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 1870 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1574 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1488 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 1804 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 1870 ms, 7434104 bytes in 354034 allocations
boost::unordered_flat_map, FNV-1a: 1236 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1507 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1463 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1355 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 106 ms, 932 bytes in 59 allocations
boost::unordered_map: 107 ms, 1152 bytes in 60 allocations
boost::unordered_flat_map: 125 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 171 ms, 1536 bytes in 2 allocations
absl::node_hash_map: 155 ms, 1108 bytes in 59 allocations
absl::flat_hash_map: 149 ms, 1152 bytes in 1 allocations
Clang 12, x86
string.cpp
std::unordered_map: 36483 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 25082 ms, 156295880 bytes in 3999510 allocations
boost::unordered_flat_map: 18419 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 22648 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 22627 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 22853 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 36572 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 28639 ms, 156295880 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 17540 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 22966 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 20988 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 20749 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 30038 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 22973 ms, 92303752 bytes in 3999510 allocations
boost::unordered_flat_map: 15520 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 19793 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 20606 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 20335 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 29954 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 22640 ms, 92303752 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 15839 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 19850 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18985 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 18644 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 12056 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 10907 ms, 100271784 bytes in 5996682 allocations
boost::unordered_flat_map: 9697 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 11310 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 14394 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 12373 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 16186 ms, 148311624 bytes in 6000002 allocations
boost::unordered_flat_map: 11474 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 18737 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 14001 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 12600 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 40755 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 35145 ms, 196311624 bytes in 6000002 allocations
boost::unordered_flat_map: 17259 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 22319 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 23743 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 22459 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2208 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 2069 ms, 7434104 bytes in 354034 allocations
boost::unordered_flat_map: 1361 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 2030 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1983 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1849 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 1820 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 1988 ms, 7434104 bytes in 354034 allocations
boost::unordered_flat_map, FNV-1a: 1274 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1677 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1654 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1622 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 106 ms, 932 bytes in 59 allocations
boost::unordered_map: 150 ms, 1152 bytes in 60 allocations
boost::unordered_flat_map: 130 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 184 ms, 1536 bytes in 2 allocations
absl::node_hash_map: 187 ms, 1108 bytes in 59 allocations
absl::flat_hash_map: 127 ms, 1152 bytes in 1 allocations
Visual Studio 2019, x86
string.cpp
std::unordered_map: 37428 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map: 38047 ms, 156295880 bytes in 3999510 allocations
boost::unordered_flat_map: 25727 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 31533 ms, 215927716 bytes in 2 allocations
absl::node_hash_map: 32686 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map: 34168 ms, 243269620 bytes in 1 allocations
std::unordered_map, FNV-1a: 35823 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 35726 ms, 156295880 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 23859 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 24135 ms, 215927716 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 28199 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 30054 ms, 243269620 bytes in 1 allocations
string_view.cpp
std::unordered_map: 32716 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map: 35284 ms, 92303752 bytes in 3999510 allocations
boost::unordered_flat_map: 21955 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 29840 ms, 130888372 bytes in 2 allocations
absl::node_hash_map: 31232 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map: 29136 ms, 109051908 bytes in 1 allocations
std::unordered_map, FNV-1a: 32654 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 34616 ms, 92303752 bytes in 3999510 allocations
boost::unordered_flat_map, FNV-1a: 22078 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 22575 ms, 130888372 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 27121 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 24889 ms, 109051908 bytes in 1 allocations
uint32.cpp
std::unordered_map: 19827 ms, 163055760 bytes in 5996682 allocations
boost::unordered_map: 16409 ms, 100271784 bytes in 5996682 allocations
boost::unordered_flat_map: 10180 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 18160 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 18430 ms, 89916492 bytes in 5996681 allocations
absl::flat_hash_map: 13887 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 25491 ms, 211108888 bytes in 6000002 allocations
boost::unordered_map: 25559 ms, 172311624 bytes in 6000002 allocations
boost::unordered_flat_map: 12581 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 21639 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 22117 ms, 137943052 bytes in 6000001 allocations
absl::flat_hash_map: 20344 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 36352 ms, 259108896 bytes in 6000002 allocations
boost::unordered_map: 42222 ms, 220311624 bytes in 6000002 allocations
boost::unordered_flat_map: 21557 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 32107 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 40295 ms, 185943052 bytes in 6000001 allocations
absl::flat_hash_map: 40551 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2674 ms, 11274964 bytes in 354034 allocations
boost::unordered_map: 3156 ms, 7434104 bytes in 354034 allocations
boost::unordered_flat_map: 1684 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 3945 ms, 9793612 bytes in 2 allocations
absl::node_hash_map: 3009 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map: 2608 ms, 6815748 bytes in 1 allocations
std::unordered_map, FNV-1a: 2711 ms, 11274964 bytes in 354034 allocations
boost::unordered_map, FNV-1a: 2862 ms, 7434104 bytes in 354034 allocations
boost::unordered_flat_map, FNV-1a: 1436 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 2177 ms, 9793612 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 2202 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1837 ms, 6815748 bytes in 1 allocations
word_size.cpp
std::unordered_map: 161 ms, 1456 bytes in 60 allocations
boost::unordered_map: 219 ms, 1152 bytes in 60 allocations
boost::unordered_flat_map: 89 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 190 ms, 1528 bytes in 2 allocations
absl::node_hash_map: 159 ms, 1116 bytes in 59 allocations
absl::flat_hash_map: 193 ms, 1160 bytes in 1 allocations