Den 13-10-2017 kl. 19:45 skrev Benedek Thaler via Boost:
(It'd be great if someone could re-run these tests to verify my results)
I gave it a try. My compile options are /GS- /GL /analyze- /W3 /Gy /Zc:wchar_t /I"C:\dezide_cpp_projects\CDependencies\include" /Zi /Gm- /O2 /Ob2 /Fd"Release\vc141.pdb" /Zc:inline /fp:precise /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_UNICODE" /D "UNICODE" /errorReport:prompt /WX- /Zc:forScope /arch:SSE2 /Gd /Oy- /Oi /MD /Fa"Release\" /EHsc /nologo /Fo"Release\" /FAs /Ot /Fp"Release\TestDoubleEnded.pch" /diagnostics:classic /D _SECURE_SCL=0 /D _CRT_SECURE_NO_DEPRECATE=1 /D _SCL_SECURE_NO_DEPRECATE=1 /D _CRT_NONSTDC_NO_DEPRECATE=1 /D BOOST_DISABLE_ASSERTS /Qpar /DHAVE_STD_REGEX 32 bit: Run on (8 X 3492 MHz CPU s) 10/13/17 20:12:05 ------------------------------------------------------------- Benchmark Time CPU Iterations ------------------------------------------------------------- devector_insert/8 3266 ns 3105 ns 236166 devector_insert/64 26578 ns 28473 ns 34517 devector_insert/512 227531 ns 255922 ns 2804 devector_insert/4096 2505054 ns 2836382 ns 374 devector_insert/32768 68911138 ns 74880480 ns 10 devector_insert/65536 259531320 ns 254801633 ns 3 cvector_insert/8 3290 ns 3598 ns 195094 cvector_insert/64 26778 ns 26700 ns 28045 cvector_insert/512 227676 ns 219034 ns 3205 cvector_insert/4096 2592786 ns 2192785 ns 249 cvector_insert/32768 79741257 ns 71067122 ns 9 cvector_insert/65536 298786812 ns 280801800 ns 2 64 bit: Run on (8 X 3492 MHz CPU s) 10/13/17 20:08:24 ------------------------------------------------------------- Benchmark Time CPU Iterations ------------------------------------------------------------- devector_insert/8 1609 ns 1577 ns 524336 devector_insert/64 12828 ns 14185 ns 112179 devector_insert/512 117994 ns 156453 ns 4487 devector_insert/4096 1668282 ns 1813238 ns 499 devector_insert/32768 70929677 ns 80229086 ns 7 devector_insert/65536 278686251 ns 312002000 ns 2 cvector_insert/8 1603 ns 1596 ns 498572 cvector_insert/64 13468 ns 12724 ns 74786 cvector_insert/512 133092 ns 126901 ns 8974 cvector_insert/4096 2624790 ns 2561781 ns 408 cvector_insert/32768 140670228 ns 146640940 ns 5 cvector_insert/65536 624126003 ns 702004500 ns 1 I wonder why there is so little difference when the container is small. I tried to replace int with std::array<std::string, 32>: 32 bit: Run on (8 X 3492 MHz CPU s) 10/13/17 20:27:33 ------------------------------------------------------------ Benchmark Time CPU Iterations ------------------------------------------------------------ devector_insert/8 14473 ns 16062 ns 40792 devector_insert/64 223566 ns 205850 ns 2804 devector_insert/512 8662095 ns 9750063 ns 64 devector_insert/4096 516563332 ns 475803050 ns 2 cvector_insert/8 12911 ns 10326 ns 49857 cvector_insert/64 319786 ns 344166 ns 2493 cvector_insert/512 16773834 ns 18973095 ns 37 cvector_insert/4096 1056974335 ns 920405900 ns 1 64 bit: Run on (8 X 3492 MHz CPU s) 10/13/17 20:28:54 ------------------------------------------------------------ Benchmark Time CPU Iterations ------------------------------------------------------------ devector_insert/8 10183 ns 11056 ns 74786 devector_insert/64 178753 ns 187744 ns 4487 devector_insert/512 7788603 ns 8666722 ns 90 devector_insert/4096 493624150 ns 475803050 ns 2 cvector_insert/8 9110 ns 9804 ns 74786 cvector_insert/64 275540 ns 294866 ns 2804 cvector_insert/512 15341661 ns 18373451 ns 45 cvector_insert/4096 978790847 ns 904805800 ns 1 kind regards Thorsten