Aggregated benchmarks simulating real-life scenarios, provided as part of Boost.Unordered source code.
gcc-x64: GCC 12, x64clang-x64: Clang 15, x64vs-x64: Visual Studio 2022, x64clang-arm64: Clang 12 ARM64gcc-x86: GCC 12, x86clang-x86: Clang 12, x86vs-x86: Visual Studio 2022, x86
string.cpp
std::unordered_map: 35418 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 21681 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 10807 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 11220 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 10492 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 13268 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 13148 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 39444 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 27467 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 14755 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 16165 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 19211 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18543 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 17217 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 33325 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 21747 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 10488 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 10407 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 9883 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 12906 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 11803 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 37682 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 28088 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 14490 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 14589 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 18353 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18030 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16836 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 13145 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 10170 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 6712 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 4553 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 8082 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 9417 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 6645 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 13625 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 10975 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 6956 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 5247 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 7906 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 9152 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 7098 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 31145 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 25371 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 11178 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 9634 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 14985 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 13837 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 10887 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 29918 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 21081 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 13543 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 11598 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 14321 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 14147 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 12051 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 29232 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 20654 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 14176 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 12185 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 24785 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 14623 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 12602 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1302 ms, 3728 bytes in 114 allocations
boost::unordered_map: 693 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 615 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 530 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 591 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 546 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 513 ms, 4352 bytes in 1 allocations
string.cpp
std::unordered_map: 35549 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 21634 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 11116 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 11703 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 12699 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 12148 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 12039 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 36251 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 24216 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 13394 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 14464 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17703 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17367 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15932 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 33530 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 21425 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 10964 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 11187 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 13374 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 12155 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 11133 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 34686 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 25072 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 13270 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 13788 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17507 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16375 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15780 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 12220 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 10606 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 6936 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 4627 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 7880 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 9152 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 6126 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 14069 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 11158 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 7290 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 5491 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 7694 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 9472 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 7084 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 29944 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 23567 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 11787 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 10223 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 13449 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 14121 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 11719 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 32253 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 24537 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 15069 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 13030 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 16940 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 16947 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 14475 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 30870 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 23917 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 15293 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 13454 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 27150 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17233 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 14817 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1429 ms, 3728 bytes in 114 allocations
boost::unordered_map: 1063 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 629 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 688 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 886 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 981 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 626 ms, 4352 bytes in 1 allocations
string.cpp
std::unordered_map: 26105 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map: 19650 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 10833 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 9807 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 11527 ms, 279707224 bytes in 2 allocations
absl::node_hash_map: 15547 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 14374 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 26222 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 25647 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 14350 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 13319 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17017 ms, 279707224 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17773 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16430 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 23447 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map: 18947 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 9897 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 8417 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 10902 ms, 194667880 bytes in 2 allocations
absl::node_hash_map: 14175 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 12260 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 23574 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 24696 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 12864 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 11317 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 15899 ms, 194667880 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16197 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 14122 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 10418 ms, 278138072 bytes in 5996682 allocations
boost::unordered_map: 8964 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 5590 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 3254 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 6404 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 7733 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 4867 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 13655 ms, 326217760 bytes in 6000002 allocations
boost::unordered_map: 11824 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 6237 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 3698 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 6383 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 8415 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 5166 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 14397 ms, 374217768 bytes in 6000002 allocations
boost::unordered_map: 20892 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 9061 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 6587 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 11583 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 15879 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 12725 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 16738 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map: 18704 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 12117 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 10013 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 13008 ms, 54572488 bytes in 2 allocations
absl::node_hash_map: 16365 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 14212 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 14957 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map, FNV-1a: 17303 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 10831 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 9159 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21844 ms, 54572488 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 13476 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 11710 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 823 ms, 11840 bytes in 115 allocations
boost::unordered_map: 1568 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 1296 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 460 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 702 ms, 4304 bytes in 2 allocations
absl::node_hash_map: 1691 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 1506 ms, 4352 bytes in 1 allocations
string.cpp
std::unordered_map: 15645 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map: 12872 ms, 213457840 bytes in 3999510 allocations
boost::unordered_node_map: 7084 ms, 199287432 bytes in 3999509 allocations
boost::unordered_flat_map: 6382 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map: 7103 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 8453 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map: 7892 ms, 276824040 bytes in 1 allocations
std::unordered_map, FNV-1a: 21112 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 16191 ms, 213457840 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 8793 ms, 199287432 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 8173 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10832 ms, 201326592 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 9932 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 9219 ms, 276824040 bytes in 1 allocations
string_view.cpp
std::unordered_map: 14175 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map: 10736 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 6425 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 5915 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 6690 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 8231 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map: 7417 ms, 209715184 bytes in 1 allocations
std::unordered_map, FNV-1a: 20243 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 15732 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 8724 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 7908 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10474 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 9013 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 8220 ms, 209715184 bytes in 1 allocations
uint32.cpp
std::unordered_map: 7794 ms, 196600184 bytes in 5996681 allocations
boost::unordered_map: 4670 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 3149 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 2107 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 4068 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 3664 ms, 123470912 bytes in 5996681 allocations
absl::flat_hash_map: 2578 ms, 75497472 bytes in 1 allocations
uint64.cpp
std::unordered_map: 7768 ms, 244679864 bytes in 6000001 allocations
boost::unordered_map: 4964 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 3252 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 2207 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 3766 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 4100 ms, 171497472 bytes in 6000001 allocations
absl::flat_hash_map: 3125 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 15123 ms, 292679864 bytes in 6000001 allocations
boost::unordered_map: 12471 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 5069 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 4245 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 7705 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 6004 ms, 219497472 bytes in 6000001 allocations
absl::flat_hash_map: 4885 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 17858 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map: 15365 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 8572 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 7630 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 11076 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 9344 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map: 8529 ms, 52428784 bytes in 1 allocations
std::unordered_map, FNV-1a: 16356 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 14477 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 8470 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 7567 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 24269 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 8761 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 7837 ms, 52428784 bytes in 1 allocations
word_size.cpp
std::unordered_map: 936 ms, 5192 bytes in 114 allocations
boost::unordered_map: 609 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 329 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 273 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 394 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 270 ms, 4112 bytes in 114 allocations
absl::flat_hash_map: 315 ms, 4344 bytes in 1 allocations
string.cpp
std::unordered_map: 34827 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 24586 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 16971 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 16445 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 26552 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 18569 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 18191 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 38342 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 28084 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 18938 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 18074 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 22045 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 19375 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 19016 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 32141 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 25307 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 17044 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 16239 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 26205 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 18110 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 17626 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 36884 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 28785 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 18678 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 17962 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21467 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18807 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 18471 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 16869 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 12188 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 11891 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 9257 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 13071 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 14779 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 12572 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 19166 ms, 148311624 bytes in 6000002 allocations
boost::unordered_node_map: 14500 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 11150 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 20215 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 15919 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 13316 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 37872 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 33326 ms, 196311624 bytes in 6000002 allocations
boost::unordered_node_map: 18879 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 17182 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 22155 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 21590 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 19883 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2057 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 2019 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 1430 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 1330 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 2014 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1560 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1453 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 1835 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 1866 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 1340 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 1247 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1510 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1418 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1373 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 102 ms, 932 bytes in 59 allocations
boost::unordered_map: 112 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 138 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 132 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 153 ms, 1536 bytes in 2 allocations
absl::node_hash_map: 158 ms, 1108 bytes in 59 allocations
absl::flat_hash_map: 138 ms, 1152 bytes in 1 allocations
string.cpp
std::unordered_map: 34373 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 24395 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 17139 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 16822 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 24527 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 20518 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 21221 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 34689 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 24222 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 17513 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 17608 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21955 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18340 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 18858 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 31242 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 23505 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 16831 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 15692 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 21522 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 19962 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 19831 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 32714 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 23909 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 17528 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 16825 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21592 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18233 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 17262 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 12210 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 10996 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 11985 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 9240 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 11292 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 14131 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 11964 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 17945 ms, 148311624 bytes in 6000002 allocations
boost::unordered_node_map: 14253 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 11838 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 15481 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 16307 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 13413 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 41739 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 35563 ms, 196311624 bytes in 6000002 allocations
boost::unordered_node_map: 19968 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 18250 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 25564 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 21682 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 20668 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2233 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 2160 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 1495 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 1389 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 2076 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1962 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1864 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 2026 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 2062 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 1429 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 1315 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1718 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1688 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1591 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 106 ms, 932 bytes in 59 allocations
boost::unordered_map: 169 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 135 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 140 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 189 ms, 1536 bytes in 2 allocations
absl::node_hash_map: 175 ms, 1108 bytes in 59 allocations
absl::flat_hash_map: 116 ms, 1152 bytes in 1 allocations
string.cpp
std::unordered_map: 24020 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map: 22806 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 11867 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 11463 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 22670 ms, 215927716 bytes in 2 allocations
absl::node_hash_map: 17127 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map: 16395 ms, 243269620 bytes in 1 allocations
std::unordered_map, FNV-1a: 24063 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 22802 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 11846 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 11451 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 16554 ms, 215927716 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 14923 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15231 ms, 243269620 bytes in 1 allocations
string_view.cpp
std::unordered_map: 23405 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map: 20584 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 9955 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 8956 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 21447 ms, 130888372 bytes in 2 allocations
absl::node_hash_map: 16277 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map: 14714 ms, 109051908 bytes in 1 allocations
std::unordered_map, FNV-1a: 22114 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 21740 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 10636 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 9679 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 16658 ms, 130888372 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 13721 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 12223 ms, 109051908 bytes in 1 allocations
uint32.cpp
std::unordered_map: 11600 ms, 163055760 bytes in 5996682 allocations
boost::unordered_map: 8738 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 5928 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 4171 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 10461 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 9256 ms, 89916492 bytes in 5996681 allocations
absl::flat_hash_map: 5722 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 14771 ms, 211108888 bytes in 6000002 allocations
boost::unordered_map: 15050 ms, 172311624 bytes in 6000002 allocations
boost::unordered_node_map: 7577 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 5774 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 15616 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 9675 ms, 137943052 bytes in 6000001 allocations
absl::flat_hash_map: 7291 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 22651 ms, 259108896 bytes in 6000002 allocations
boost::unordered_map: 25965 ms, 220311624 bytes in 6000002 allocations
boost::unordered_node_map: 11448 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 10535 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 17942 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 16839 ms, 185943052 bytes in 6000001 allocations
absl::flat_hash_map: 14307 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 1424 ms, 11274964 bytes in 354034 allocations
boost::unordered_map: 1550 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 989 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 868 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 2136 ms, 9793612 bytes in 2 allocations
absl::node_hash_map: 1567 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map: 1416 ms, 6815748 bytes in 1 allocations
std::unordered_map, FNV-1a: 1277 ms, 11274964 bytes in 354034 allocations
boost::unordered_map, FNV-1a: 1388 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 840 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 760 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1102 ms, 9793612 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1058 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 941 ms, 6815748 bytes in 1 allocations
word_size.cpp
std::unordered_map: 103 ms, 1456 bytes in 60 allocations
boost::unordered_map: 108 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 75 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 65 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 94 ms, 1528 bytes in 2 allocations
absl::node_hash_map: 91 ms, 1116 bytes in 59 allocations
absl::flat_hash_map: 85 ms, 1160 bytes in 1 allocations