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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 12, x64clang-x64: Clang 15, x64vs-x64: Visual Studio 2022, x64clang-arm64: Clang 12 ARM64gcc-x86: GCC 12, x86clang-x86: Clang 15, x86vs-x86: Visual Studio 2022, x86
Summary results
GCC 12, x64
string.cpp
std::unordered_map: 34737 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 21618 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 10809 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 11363 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 10538 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 13218 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 13481 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 38873 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 26576 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 14689 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 16239 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 18831 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17749 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 17355 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 33203 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 21649 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 10535 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 10425 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 10109 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 12876 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 11780 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 37431 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 27801 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 14567 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 14497 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 18313 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17852 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16618 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 13786 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 10505 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 7054 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 4791 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 8363 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 9960 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 6770 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 14123 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 10902 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 7435 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 5457 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 8320 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 9394 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 7098 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 32259 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 25662 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 11364 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 10244 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 15602 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 13967 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 11287 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 29948 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 21254 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 13579 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 11553 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 14376 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 14122 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 12091 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 29188 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 20894 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 14018 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 12151 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 25323 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 14768 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 12508 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1304 ms, 3728 bytes in 114 allocations
boost::unordered_map: 608 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 614 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 534 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 597 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 547 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 522 ms, 4352 bytes in 1 allocations
Clang 15, x64
string.cpp
std::unordered_map: 35023 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map: 21679 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 11132 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 11951 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 13598 ms, 234881024 bytes in 2 allocations
absl::node_hash_map: 12463 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 12327 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 36097 ms, 271711224 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 24614 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 13487 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 14068 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 18216 ms, 234881024 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17186 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16129 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 34476 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map: 21971 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 11374 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 11486 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 13231 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 12480 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 11382 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 35338 ms, 207719096 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 25550 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 13582 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 13976 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17671 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17042 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15951 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 12756 ms, 192888392 bytes in 5996681 allocations
boost::unordered_map: 10163 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 7303 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 4910 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 8040 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 9674 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 6562 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 13995 ms, 240941512 bytes in 6000001 allocations
boost::unordered_map: 10225 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 7438 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 5529 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 7661 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 9673 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 7442 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 30662 ms, 288941512 bytes in 6000001 allocations
boost::unordered_map: 24152 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 11981 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 10676 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 13750 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 15192 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 12346 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 31996 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map: 24583 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 15153 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 13330 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 16929 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 17040 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 14588 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 30865 ms, 68323424 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 23826 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 15219 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 13475 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 27271 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17270 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 14889 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 1428 ms, 3728 bytes in 114 allocations
boost::unordered_map: 1060 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 628 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 645 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 883 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 982 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 618 ms, 4352 bytes in 1 allocations
Visual Studio 2022, x64
string.cpp
std::unordered_map: 26353 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map: 19804 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map: 10854 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map: 9798 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map: 11544 ms, 279707224 bytes in 2 allocations
absl::node_hash_map: 15640 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map: 14472 ms, 343932904 bytes in 1 allocations
std::unordered_map, FNV-1a: 26320 ms, 291081368 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 25940 ms, 245453904 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 14429 ms, 231283496 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 13380 ms, 322961400 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 17079 ms, 279707224 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 17857 ms, 235477800 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 16472 ms, 343932904 bytes in 1 allocations
string_view.cpp
std::unordered_map: 23583 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map: 19097 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 9861 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 8490 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 10970 ms, 194667880 bytes in 2 allocations
absl::node_hash_map: 14167 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map: 12298 ms, 209715192 bytes in 1 allocations
std::unordered_map, FNV-1a: 23535 ms, 227089224 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 24935 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 12894 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 11430 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 15935 ms, 194667880 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 16181 ms, 171485672 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 14083 ms, 209715192 bytes in 1 allocations
uint32.cpp
std::unordered_map: 10427 ms, 278138072 bytes in 5996682 allocations
boost::unordered_map: 8944 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 5382 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 3222 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 6514 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 7689 ms, 123470920 bytes in 5996681 allocations
absl::flat_hash_map: 4858 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 13695 ms, 326217760 bytes in 6000002 allocations
boost::unordered_map: 11810 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 6143 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 3669 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 6377 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 8420 ms, 171497480 bytes in 6000001 allocations
absl::flat_hash_map: 5179 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 14394 ms, 374217768 bytes in 6000002 allocations
boost::unordered_map: 20897 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 8978 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 6611 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 11532 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 15950 ms, 219497480 bytes in 6000001 allocations
absl::flat_hash_map: 12726 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 16824 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map: 19135 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 12250 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 10246 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 13155 ms, 54572488 bytes in 2 allocations
absl::node_hash_map: 16563 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map: 14357 ms, 52428792 bytes in 1 allocations
std::unordered_map, FNV-1a: 15161 ms, 90300672 bytes in 1418657 allocations
boost::unordered_map, FNV-1a: 17396 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 11935 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 9225 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21964 ms, 54572488 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 13742 ms, 52922096 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 11811 ms, 52428792 bytes in 1 allocations
word_size.cpp
std::unordered_map: 827 ms, 11840 bytes in 115 allocations
boost::unordered_map: 1573 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 1303 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 466 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 716 ms, 4304 bytes in 2 allocations
absl::node_hash_map: 1699 ms, 4120 bytes in 114 allocations
absl::flat_hash_map: 1511 ms, 4352 bytes in 1 allocations
Clang 12, ARM64
string.cpp
std::unordered_map: 15673 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map: 12807 ms, 213457840 bytes in 3999510 allocations
boost::unordered_node_map: 7030 ms, 199287432 bytes in 3999509 allocations
boost::unordered_flat_map: 6297 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map: 7174 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 8392 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map: 7906 ms, 276824040 bytes in 1 allocations
std::unordered_map, FNV-1a: 20948 ms, 244656248 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 16158 ms, 213457840 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 8755 ms, 199287432 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 8157 ms, 260046848 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10809 ms, 201326592 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 9757 ms, 203481728 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 9222 ms, 276824040 bytes in 1 allocations
string_view.cpp
std::unordered_map: 14079 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map: 10701 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map: 6403 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map: 5879 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 6692 ms, 167772160 bytes in 2 allocations
absl::node_hash_map: 8066 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map: 7469 ms, 209715184 bytes in 1 allocations
std::unordered_map, FNV-1a: 20090 ms, 212660184 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 15661 ms, 181461776 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 8593 ms, 167291368 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 7866 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 10477 ms, 167772160 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 9001 ms, 171485664 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 7984 ms, 209715184 bytes in 1 allocations
uint32.cpp
std::unordered_map: 7725 ms, 196600184 bytes in 5996681 allocations
boost::unordered_map: 4705 ms, 149424400 bytes in 5996682 allocations
boost::unordered_node_map: 3059 ms, 119276616 bytes in 5996681 allocations
boost::unordered_flat_map: 2088 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 4062 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 3638 ms, 123470912 bytes in 5996681 allocations
absl::flat_hash_map: 2554 ms, 75497472 bytes in 1 allocations
uint64.cpp
std::unordered_map: 7787 ms, 244679864 bytes in 6000001 allocations
boost::unordered_map: 5068 ms, 197477520 bytes in 6000002 allocations
boost::unordered_node_map: 3106 ms, 167303176 bytes in 6000001 allocations
boost::unordered_flat_map: 2158 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 3663 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 3862 ms, 171497472 bytes in 6000001 allocations
absl::flat_hash_map: 3083 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 15032 ms, 292679864 bytes in 6000001 allocations
boost::unordered_map: 12474 ms, 245477520 bytes in 6000002 allocations
boost::unordered_node_map: 5078 ms, 215303176 bytes in 6000001 allocations
boost::unordered_flat_map: 4352 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 7690 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 5955 ms, 219497472 bytes in 6000001 allocations
absl::flat_hash_map: 4859 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 16870 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map: 15241 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map: 8399 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map: 7689 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map: 11000 ms, 67108864 bytes in 2 allocations
absl::node_hash_map: 9253 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map: 8404 ms, 52428784 bytes in 1 allocations
std::unordered_map, FNV-1a: 16279 ms, 69916096 bytes in 1418656 allocations
boost::unordered_map, FNV-1a: 14404 ms, 58766384 bytes in 1418657 allocations
boost::unordered_node_map, FNV-1a: 8424 ms, 51873520 bytes in 1418656 allocations
boost::unordered_flat_map, FNV-1a: 7620 ms, 49283064 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 24303 ms, 67108864 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 8749 ms, 52922088 bytes in 1418656 allocations
absl::flat_hash_map, FNV-1a: 7897 ms, 52428784 bytes in 1 allocations
word_size.cpp
std::unordered_map: 440 ms, 5192 bytes in 114 allocations
boost::unordered_map: 616 ms, 4392 bytes in 115 allocations
boost::unordered_node_map: 331 ms, 3992 bytes in 114 allocations
boost::unordered_flat_map: 273 ms, 4096 bytes in 1 allocations
ankerl::unordered_dense::map: 393 ms, 4096 bytes in 2 allocations
absl::node_hash_map: 271 ms, 4112 bytes in 114 allocations
absl::flat_hash_map: 315 ms, 4344 bytes in 1 allocations
GCC 12, x86
string.cpp
std::unordered_map: 35491 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 25152 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 17349 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 16637 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 27562 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 18793 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 18225 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 39097 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 28597 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 19100 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 17997 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 22064 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 19693 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 19504 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 32523 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 25007 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 16592 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 15721 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 26531 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 18414 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 17554 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 36710 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 28616 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 18373 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 18226 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21395 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 19167 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 18960 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 16706 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 12215 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 11852 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 9311 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 13460 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 14553 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 12572 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 19966 ms, 148311624 bytes in 6000002 allocations
boost::unordered_node_map: 14289 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 11348 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 20012 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 15840 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 13843 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 38520 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 32926 ms, 196311624 bytes in 6000002 allocations
boost::unordered_node_map: 19081 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 17404 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 22317 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 21772 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 20253 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2152 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 2029 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 1424 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 1337 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 1968 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1581 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1477 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 1890 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 1883 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 1353 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 1218 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1502 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1457 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1358 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 103 ms, 932 bytes in 59 allocations
boost::unordered_map: 112 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 171 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 131 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 158 ms, 1536 bytes in 2 allocations
absl::node_hash_map: 153 ms, 1108 bytes in 59 allocations
absl::flat_hash_map: 158 ms, 1152 bytes in 1 allocations
Clang 15, x86
string.cpp
std::unordered_map: 35254 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map: 24806 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 17482 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 16951 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 24977 ms, 184549376 bytes in 2 allocations
absl::node_hash_map: 20828 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map: 21618 ms, 243269612 bytes in 1 allocations
std::unordered_map, FNV-1a: 35650 ms, 167851676 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 24814 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 17829 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 17491 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21987 ms, 184549376 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18647 ms, 153929268 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 19087 ms, 243269612 bytes in 1 allocations
string_view.cpp
std::unordered_map: 32092 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map: 23889 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 17102 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 16252 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 22205 ms, 117440512 bytes in 2 allocations
absl::node_hash_map: 20696 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map: 20181 ms, 109051900 bytes in 1 allocations
std::unordered_map, FNV-1a: 34070 ms, 103859548 bytes in 3999509 allocations
boost::unordered_map, FNV-1a: 24570 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 17711 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 17191 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 21869 ms, 117440512 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 18200 ms, 89937140 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 17680 ms, 109051900 bytes in 1 allocations
uint32.cpp
std::unordered_map: 12146 ms, 120430916 bytes in 5996681 allocations
boost::unordered_map: 10923 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 11819 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 9501 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 11220 ms, 134217728 bytes in 2 allocations
absl::node_hash_map: 14001 ms, 89916484 bytes in 5996681 allocations
absl::flat_hash_map: 11873 ms, 75497472 bytes in 1 allocations
uint64.cpp
boost::unordered_map: 18273 ms, 148311624 bytes in 6000002 allocations
boost::unordered_node_map: 14676 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 11879 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 15508 ms, 201326592 bytes in 2 allocations
absl::node_hash_map: 15594 ms, 137943044 bytes in 6000001 allocations
absl::flat_hash_map: 13144 ms, 142606328 bytes in 1 allocations
uuid.cpp
std::unordered_map: 42675 ms, 216470756 bytes in 6000001 allocations
boost::unordered_map: 35310 ms, 196311624 bytes in 6000002 allocations
boost::unordered_node_map: 19943 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 18094 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 26781 ms, 268435456 bytes in 2 allocations
absl::node_hash_map: 22311 ms, 185943044 bytes in 6000001 allocations
absl::flat_hash_map: 20794 ms, 209715184 bytes in 1 allocations
word_count.cpp
std::unordered_map: 2214 ms, 9931428 bytes in 354033 allocations
boost::unordered_map: 2156 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 1505 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 1403 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 2036 ms, 10485760 bytes in 2 allocations
absl::node_hash_map: 1965 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map: 1869 ms, 6815740 bytes in 1 allocations
std::unordered_map, FNV-1a: 2017 ms, 9931428 bytes in 354033 allocations
boost::unordered_map, FNV-1a: 2051 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 1420 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 1317 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1711 ms, 10485760 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1689 ms, 6869828 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 1606 ms, 6815740 bytes in 1 allocations
word_size.cpp
std::unordered_map: 106 ms, 932 bytes in 59 allocations
boost::unordered_map: 165 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 135 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 141 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
Visual Studio 2022, x86
string.cpp
std::unordered_map: 24065 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map: 22939 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map: 11920 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map: 11482 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map: 23210 ms, 215927716 bytes in 2 allocations
absl::node_hash_map: 17335 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map: 16595 ms, 243269620 bytes in 1 allocations
std::unordered_map, FNV-1a: 24110 ms, 177536756 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 22808 ms, 156295880 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 11860 ms, 151832124 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 11423 ms, 228589564 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 16539 ms, 215927716 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 14915 ms, 153929276 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 15192 ms, 243269620 bytes in 1 allocations
string_view.cpp
std::unordered_map: 23590 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map: 20813 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map: 10077 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map: 9085 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map: 21466 ms, 130888372 bytes in 2 allocations
absl::node_hash_map: 16263 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map: 14733 ms, 109051908 bytes in 1 allocations
std::unordered_map, FNV-1a: 22033 ms, 113544612 bytes in 3999510 allocations
boost::unordered_map, FNV-1a: 21838 ms, 92303752 bytes in 3999510 allocations
boost::unordered_node_map, FNV-1a: 10705 ms, 87839996 bytes in 3999509 allocations
boost::unordered_flat_map, FNV-1a: 9644 ms, 102760452 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 16608 ms, 130888372 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 13779 ms, 89937148 bytes in 3999509 allocations
absl::flat_hash_map, FNV-1a: 12168 ms, 109051908 bytes in 1 allocations
uint32.cpp
std::unordered_map: 11610 ms, 163055760 bytes in 5996682 allocations
boost::unordered_map: 8876 ms, 100271784 bytes in 5996682 allocations
boost::unordered_node_map: 5978 ms, 87819340 bytes in 5996681 allocations
boost::unordered_flat_map: 4188 ms, 71303176 bytes in 1 allocations
ankerl::unordered_dense::map: 10439 ms, 130888368 bytes in 2 allocations
absl::node_hash_map: 9295 ms, 89916492 bytes in 5996681 allocations
absl::flat_hash_map: 5698 ms, 75497480 bytes in 1 allocations
uint64.cpp
std::unordered_map: 14729 ms, 211108888 bytes in 6000002 allocations
boost::unordered_map: 15046 ms, 172311624 bytes in 6000002 allocations
boost::unordered_node_map: 7596 ms, 135845900 bytes in 6000001 allocations
boost::unordered_flat_map: 5803 ms, 134217728 bytes in 1 allocations
ankerl::unordered_dense::map: 15689 ms, 194667872 bytes in 2 allocations
absl::node_hash_map: 9496 ms, 137943052 bytes in 6000001 allocations
absl::flat_hash_map: 7274 ms, 142606336 bytes in 1 allocations
uuid.cpp
std::unordered_map: 22676 ms, 259108896 bytes in 6000002 allocations
boost::unordered_map: 25942 ms, 220311624 bytes in 6000002 allocations
boost::unordered_node_map: 11494 ms, 183845900 bytes in 6000001 allocations
boost::unordered_flat_map: 10555 ms, 197132280 bytes in 1 allocations
ankerl::unordered_dense::map: 17920 ms, 258447376 bytes in 2 allocations
absl::node_hash_map: 16862 ms, 185943052 bytes in 6000001 allocations
absl::flat_hash_map: 14313 ms, 209715192 bytes in 1 allocations
word_count.cpp
std::unordered_map: 1389 ms, 11274964 bytes in 354034 allocations
boost::unordered_map: 1544 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map: 975 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map: 867 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map: 2141 ms, 9793612 bytes in 2 allocations
absl::node_hash_map: 1562 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map: 1431 ms, 6815748 bytes in 1 allocations
std::unordered_map, FNV-1a: 1271 ms, 11274964 bytes in 354034 allocations
boost::unordered_map, FNV-1a: 1383 ms, 7434104 bytes in 354034 allocations
boost::unordered_node_map, FNV-1a: 836 ms, 6738764 bytes in 354033 allocations
boost::unordered_flat_map, FNV-1a: 742 ms, 6422532 bytes in 1 allocations
ankerl::unordered_dense::map, FNV-1a: 1103 ms, 9793612 bytes in 2 allocations
absl::node_hash_map, FNV-1a: 1060 ms, 6869836 bytes in 354033 allocations
absl::flat_hash_map, FNV-1a: 929 ms, 6815748 bytes in 1 allocations
word_size.cpp
std::unordered_map: 104 ms, 1456 bytes in 60 allocations
boost::unordered_map: 110 ms, 1152 bytes in 60 allocations
boost::unordered_node_map: 75 ms, 1084 bytes in 59 allocations
boost::unordered_flat_map: 68 ms, 1096 bytes in 1 allocations
ankerl::unordered_dense::map: 95 ms, 1528 bytes in 2 allocations
absl::node_hash_map: 91 ms, 1116 bytes in 59 allocations
absl::flat_hash_map: 86 ms, 1160 bytes in 1 allocations