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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: 31314 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 19163 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 9789 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 9720 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 9216 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 12076 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 11686 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 34919 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 25059 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 13860 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 14316 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17526 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17158 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16215 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 30389 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 19087 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 9832 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 9353 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 8818 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 11797 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 10720 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 33662 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 26359 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 13909 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 13372 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17008 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17050 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15735 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 10568 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 9174 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 6391 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 4401 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 7447 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 8247 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 5641 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 11455 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 9578 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 6427 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 4734 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 7302 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 8433 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 6368 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 27231 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 22912 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 10425 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 8904 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 13814 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 12757 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 10764 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 28132 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 19805 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 12857 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 11049 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 13940 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 13367 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 11444 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 27461 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 20075 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 13403 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 11719 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 24684 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 13863 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 11853 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1301 ms, 3728 bytes in 114 allocations
boost::unordered_map: 686 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 607 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 541 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 578 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 548 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 500 ms, 4352 bytes in 1 allocations
Clang 12, x64
string.cpp
std::unordered_map: 31856 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 21258 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 10575 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 10545 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 11520 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 14219 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 13892 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 34137 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 23639 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 12137 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 12168 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 16342 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16630 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15434 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 30865 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 21371 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 10609 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 10248 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 11086 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 13977 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 13133 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 31396 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 24311 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 12234 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 11870 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 15955 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16475 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15285 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 11186 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 9221 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 6313 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 4303 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 7163 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 8532 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 5808 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 13887 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 10496 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 7205 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 5445 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 7666 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 9506 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 7128 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 32838 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 27916 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 11345 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 9977 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 15440 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 15570 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 12602 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 31319 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 23310 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 14525 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 12641 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 16502 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 16280 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 13888 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 28499 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 22753 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 14274 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 12803 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 26299 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16475 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 14337 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1434 ms, 3728 bytes in 114 allocations
boost::unordered_map: 1012 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 666 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 656 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 873 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 967 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 627 ms, 4352 bytes in 1 allocations
Visual Studio 2019, x64
string.cpp
std::unordered_map: 38109 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map: 32232 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 20563 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 21062 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 16885 ms, 279707224 bytes in 2 allocations
absl::node_hash_map: 28893 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 29503 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 36705 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 36933 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 23287 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 23510 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 22564 ms, 279707224 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 28440 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 29923 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 34761 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map: 32738 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 21120 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 19279 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 16562 ms, 194667880 bytes in 2 allocations
absl::node_hash_map: 28976 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 27911 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 33458 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 37164 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 22962 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 21215 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 22070 ms, 194667880 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 28492 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 27475 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 21053 ms, 278138072 bytes in 5996682 allocations
boost::unordered_map: 14796 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 14702 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 11455 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 13195 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 17289 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 12755 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 26361 ms, 326217760 bytes in 6000002 allocations
boost::unordered_map: 20238 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 15865 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 13354 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 11563 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 18909 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 14852 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 29960 ms, 374217768 bytes in 6000002 allocations
boost::unordered_map: 40595 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 18283 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 16145 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 18809 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 29550 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 26030 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 34763 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map: 40756 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 31117 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 24549 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 26343 ms, 54572488 bytes in 2 allocations
absl::node_hash_map: 41143 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 34466 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 32187 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map, FNV-1a: 37367 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 28004 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 22103 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 42105 ms, 54572488 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 32666 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 26069 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1240 ms, 11840 bytes in 115 allocations
boost::unordered_map: 2476 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 1739 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 1557 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 1215 ms, 4304 bytes in 2 allocations
absl::node_hash_map: 2481 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 2178 ms, 4352 bytes in 1 allocations
Clang 12, ARM64
string.cpp
std::unordered_map: 15796 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map: 12865 ms, 213457840 bytes in 3999510 allocations
boost::unordered_node_map: 6771 ms, 199287432 bytes in 3999509 allocations
boost::unordered_flat_map: 6417 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map: 7144 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 8382 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map: 7947 ms, 276824040 bytes in 1 allocations
std::unordered_map, FNV-1a: 20952 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 16133 ms, 213457840 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 8432 ms, 199287432 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 8091 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10791 ms, 201326592 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 9896 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 9206 ms, 276824040 bytes in 1 allocations
string_view.cpp
std::unordered_map: 14026 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map: 10656 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 6207 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 5829 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 6680 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 8265 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map: 7440 ms, 209715184 bytes in 1 allocations
std::unordered_map, FNV-1a: 20137 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 15705 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 8459 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 7859 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10482 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 9005 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 8175 ms, 209715184 bytes in 1 allocations
uint32.cpp
std::unordered_map: 7752 ms, 196600184 bytes in 5996681 allocations
boost::unordered_map: 4734 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 3104 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 2057 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 4110 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 3632 ms, 123470912 bytes in 5996681 allocations
absl::flat_hash_map: 2531 ms, 75497472 bytes in 1 allocations
uint64.cpp
std::unordered_map: 7758 ms, 244679864 bytes in 6000001 allocations
boost::unordered_map: 5126 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 3254 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 2192 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 3661 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 4010 ms, 171497472 bytes in 6000001 allocations
absl::flat_hash_map: 3089 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 15114 ms, 292679864 bytes in 6000001 allocations
boost::unordered_map: 12488 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 4819 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 4096 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 7738 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 5973 ms, 219497472 bytes in 6000001 allocations
absl::flat_hash_map: 4883 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 16953 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map: 15287 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 8510 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 7709 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 10999 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 9267 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map: 8423 ms, 52428784 bytes in 1 allocations
std::unordered_map, FNV-1a: 16301 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 14354 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 8444 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 7618 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 24320 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 8750 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 7904 ms, 52428784 bytes in 1 allocations
word_size.cpp
std::unordered_map: 520 ms, 5192 bytes in 114 allocations
boost::unordered_map: 604 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 347 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 275 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 394 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 269 ms, 4112 bytes in 114 allocations
absl::flat_hash_map: 312 ms, 4344 bytes in 1 allocations
GCC 11, x86
string.cpp
std::unordered_map: 30646 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 22494 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 15688 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 15322 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 23847 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 16990 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 16840 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 34401 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 25330 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 17630 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 17159 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 19434 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17803 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 17805 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 28310 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 22595 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 15421 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 14671 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 24420 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 16928 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 16116 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 32073 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 25970 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 17215 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 16635 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 19311 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17571 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 17143 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 10898 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 11199 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 11424 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 8877 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 12076 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 13772 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 11705 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 17684 ms, 148311624 bytes in 6000002 allocations
boost::unordered_node_map: 13046 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 10261 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 15046 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 14653 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 12767 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 33662 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 30812 ms, 196311624 bytes in 6000002 allocations
boost::unordered_node_map: 17740 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 16175 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 20553 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 20225 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 18758 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 1947 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 1994 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 1429 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 1326 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 1891 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1569 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1495 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 1773 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 1834 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 1335 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 1235 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1505 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1447 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1356 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 105 ms, 932 bytes in 59 allocations
boost::unordered_map: 109 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 155 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 123 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 172 ms, 1536 bytes in 2 allocations
absl::node_hash_map: 153 ms, 1108 bytes in 59 allocations
absl::flat_hash_map: 139 ms, 1152 bytes in 1 allocations
Clang 12, x86
string.cpp
std::unordered_map: 32177 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 23905 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 17290 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 17293 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 19965 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 20441 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 20743 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 32275 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 25309 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 16122 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 15908 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 20498 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18920 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 18554 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 30464 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 21839 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 15775 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 14863 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 19533 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 20341 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 19702 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 30447 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 22377 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 16368 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 15737 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 19494 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18760 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 18357 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 10941 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 9953 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 10876 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 8765 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 10253 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 13130 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 11289 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 15944 ms, 148311624 bytes in 6000002 allocations
boost::unordered_node_map: 13280 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 10836 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 18872 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 14292 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 12620 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 41071 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 34792 ms, 196311624 bytes in 6000002 allocations
boost::unordered_node_map: 18585 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 16809 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 22238 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 23046 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 22085 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2171 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 2137 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 1459 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 1337 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 2031 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1947 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1854 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 1819 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 1973 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 1378 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 1267 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1690 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1648 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1607 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 107 ms, 932 bytes in 59 allocations
boost::unordered_map: 150 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 136 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 124 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 182 ms, 1536 bytes in 2 allocations
absl::node_hash_map: 186 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: 37372 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map: 36383 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 24303 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 24911 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 32466 ms, 215927716 bytes in 2 allocations
absl::node_hash_map: 32129 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map: 33514 ms, 243269620 bytes in 1 allocations
std::unordered_map, FNV-1a: 35249 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 34890 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 21821 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 22959 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 23208 ms, 215927716 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 27702 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 29113 ms, 243269620 bytes in 1 allocations
string_view.cpp
std::unordered_map: 31909 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map: 32268 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 20635 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 18624 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 28907 ms, 130888372 bytes in 2 allocations
absl::node_hash_map: 28747 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map: 26479 ms, 109051908 bytes in 1 allocations
std::unordered_map, FNV-1a: 31270 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 32347 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 20511 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 18949 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21820 ms, 130888372 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 25263 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 22873 ms, 109051908 bytes in 1 allocations
uint32.cpp
std::unordered_map: 18752 ms, 163055760 bytes in 5996682 allocations
boost::unordered_map: 13405 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 13391 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 10541 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 16469 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 17148 ms, 89916492 bytes in 5996681 allocations
absl::flat_hash_map: 13473 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 23218 ms, 211108888 bytes in 6000002 allocations
boost::unordered_map: 24437 ms, 172311624 bytes in 6000002 allocations
boost::unordered_node_map: 15183 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 13870 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 20586 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 21093 ms, 137943052 bytes in 6000001 allocations
absl::flat_hash_map: 17436 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 33982 ms, 259108896 bytes in 6000002 allocations
boost::unordered_map: 39779 ms, 220311624 bytes in 6000002 allocations
boost::unordered_node_map: 21403 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 21016 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 31032 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 37352 ms, 185943052 bytes in 6000001 allocations
absl::flat_hash_map: 36759 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2690 ms, 11274964 bytes in 354034 allocations
boost::unordered_map: 2944 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 1935 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 1654 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 3749 ms, 9793612 bytes in 2 allocations
absl::node_hash_map: 2764 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map: 2426 ms, 6815748 bytes in 1 allocations
std::unordered_map, FNV-1a: 2474 ms, 11274964 bytes in 354034 allocations
boost::unordered_map, FNV-1a: 2654 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 1640 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 1384 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 2062 ms, 9793612 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 2076 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1782 ms, 6815748 bytes in 1 allocations
word_size.cpp
std::unordered_map: 156 ms, 1456 bytes in 60 allocations
boost::unordered_map: 216 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 120 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 107 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 165 ms, 1528 bytes in 2 allocations
absl::node_hash_map: 155 ms, 1116 bytes in 59 allocations
absl::flat_hash_map: 151 ms, 1160 bytes in 1 allocations