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MSVC (Windows)

Higher score is better. [2, 64] / (sample size / count).

Performance of Thread Safe Libraries

Library [constr] [destr] conn disconn reconn emit all threaded score
* nano-signal-slot ts 39557 14125 10594 17476 16822 129100 8274 642 182908
* palacaze sigslot 4196 3153 9367 12258 14673 107786 6208 535 150826
* Montellese cpp-signal 18760 5905 8737 10005 9056 115558 4610 516 148483
* cpp11nullptr lsignal 2135 2668 4357 7860 4275 112647 2808 399 132344
* fr00b0 nod 17703 17011 12324 22018 26667 54304 10161 396 125871
* KtnSignalSlot 6070 4856 2095 9097 2546 104033 1760 85 119616
* CppFakeIt FastSignals 4540 4545 7666 17374 17561 46393 7289 140 96425
* Kosta signals-cpp 19775 6384 3841 43041 3261 36403 2686 322 89554
* nano-signal-slot tss 4464 3013 8727 7416 13815 23167 3580 373 57079
* tripleslash rocket 913 1195 6632 9722 6649 25859 3488 400 52750
* dacap observable 14061 1432 11004 9531 10932 15833 3880 40 51219
* Boost Signals2 316 598 3439 7064 2900 28426 1878 160 43866
* neolib event 17817 649 2291 4268 2708 5854 1258 91 16470

Performance of Thread Unsafe Libraries

Library [constr] [destr] conn disconn reconn emit all threaded score
jeffomatic jl_signal 31498 24112 106333 42418 105078 136499 24950 0 415278
vdksoft signals st 3751 5419 10467 162614 6152 125584 4758 0 309575
Nuclex Events 67049 63226 23401 22885 22320 135934 11067 0 215607
Wink-Signals 51907 64460 14565 24157 27097 136024 12145 0 213988
nano-signal-slot st 51845 29221 11604 20100 19311 135631 9766 0 196413
Yassi 52005 39981 10653 15775 23361 135338 9154 0 194281
palacaze sigslot 38989 19400 12778 16132 21009 134924 8994 0 193838
Ansoulom cpp-observe 51788 37464 9674 23671 14719 135312 8473 0 191849
Montellese cpp-signal 62018 23367 13639 16372 13829 135478 7617 0 186934
fr00b0 nod 30259 22519 16246 35819 50960 58418 16242 0 177685
tripleslash rocket st 1706 2756 11152 18416 11216 130377 6473 0 177635
mwthinker Signal 5069 6781 10556 13158 10128 137227 5639 0 176708
pbhogan Signals 4364 6876 12674 12002 12490 133215 5987 0 176367
amc522 Signal11 27037 33226 9820 15072 10277 130864 5741 0 171775
SimpleSignal 4897 6766 9994 9745 9020 137345 4619 0 170724
joanrieu signal11 2678 3837 13051 17369 13122 107489 6980 0 158011
supergrover sigslot 2623 3664 4458 5027 4210 134384 2106 0 150185
nano-signal-slot sts 51810 30695 11852 20611 19506 83177 8785 0 143932
iscool::signals 41598 47904 9460 42772 9668 43760 346 0 106007
EvilTwin Observer 4444 4692 4319 8106 5196 66553 3197 0 87371
libsigcplusplus 39133 37808 1931 3174 2005 72139 1201 0 80450
Boost Signals2 st 286 592 3655 9734 3097 44228 2265 0 62979
copperspice cs_signal 8071 2266 2985 3018 3021 13124 1347 0 23495
neolib event 18640 664 2488 4842 2908 5974 1344 0 17556

Size results are the size of object files from x64 release build using Visual Studio 19.

Metrics of Thread Safe Libraries

Library Build Size Signal Size Header Only Data Structure Thread Safe
* dacap observable 845 kb 184 b - std::vector X
* CppFakeIt FastSignals 855 kb 16 b - std::vector X
* nano-signal-slot ts 856 kb 32 b X std::vector X
* nano-signal-slot tss 873 kb 48 b X std::vector X
* Montellese cpp-signal 874 kb 96 b X std::forward_list X
* Kosta signals-cpp 915 kb 96 b X std::vector X
* palacaze sigslot 917 kb 104 b X std::vector X
* fr00b0 nod 924 kb 144 b X std::vector X
* cpp11nullptr lsignal 998 kb 128 b X **std::list X
* KtnSignalSlot 1071 kb 304 b X std::vector X
* tripleslash rocket 1109 kb 24 b X intrusive list X
* Boost Signals2 2158 kb 32 b - ? X
* neolib event 2582 kb 136 b - **std::unordered_map X

Metrics of Thread Unsafe Libraries

Library Build Size Signal Size Header Only Data Structure Thread Safe
jeffomatic jl_signal 210 kb 40 b - doubly linked list -
vdksoft signals st 223 kb 8 b - doubly linked list -
nano-signal-slot st 235 kb 24 b X std::vector -
Wink-Signals 246 kb 24 b X std::vector -
Montellese cpp-signal 247 kb 16 b X std::forward_list -
Nuclex Events 253 kb 40 b X dynamic array -
nano-signal-slot sts 254 kb 24 b X std::vector -
supergrover sigslot 276 kb 40 b - std::list -
mwthinker Signal 285 kb 32 b - std::list -
pbhogan Signals 293 kb 16 b X std::set -
libsigcplusplus 295 kb 16 b - std::list -
joanrieu signal11 316 kb 32 b X std::list -
palacaze sigslot 319 kb 48 b X std::vector -
Ansoulom cpp-observe 321 kb 24 b X std::vector -
Yassi 322 kb 24 b X std::vector -
EvilTwin Observer 335 kb 40 b X std::vector -
SimpleSignal 346 kb 16 b X std::vector -
fr00b0 nod 355 kb 72 b X std::vector -
tripleslash rocket st 372 kb 24 b X intrusive list -
amc522 Signal11 387 kb 16 b X std::vector -
iscool::signals 459 kb 64 b - std::vector -
copperspice cs_signal 482 kb 128 b - **RCU List DIY
Boost Signals2 st 1561 kb 32 b - ? -
neolib event 2027 kb 136 b - **std::unordered_map -
* ** []
Supports thread-safety Uses additional containers Excluded from scoring

Benchmark Algorithms

The individual benchmark algorithms are completely generic through the use of templates.

Algorithm Description
validation_assert Make sure each signal implementation is functioning correctly.
construction Sample the default construction of N * N number of Signal instances.
destruction Sample the destruction of N * N number of Signal instances.
connection Sample Signal connections to N number of Foo instances.
disconnect Sample disconnecting N number of Foo instances from a single Signal.
reconnect Sample reconnecting N number of Foo instances to a global Signal.
emit Sample the duration of an N slot emission.
all Sample all previous benchmarks together in one combined benchmark.
threaded Same as the previous benchmark but is now threaded.