A header only string helper library.
- gcc-7.1+ (or OpenMP 4.0+ supported compiler)
- google-test
- google-benchmark
- cmake 3.5+
git clone https://github.com/sahmad98/vstring cd vstring mkdir build cd build cmake .. make -j 4vstring_bench- Benchmark Binaryvstring_test- Test Binary
Architecture: x86_64 Vendor ID: GenuineIntel Model name: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz CPU MHz: 2893.361 CPU max MHz: 3100.0000 CPU min MHz: 1200.0000 L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 3072K NUMA node0 CPU(s): 0-3 Memory Size: 8 GBstoi ran on all digits from 0 to 10. Following are stoi benchmark implementations
Atoi- C library atoiStoi- C++std::stoiVStoi-vstring::atoi(implemented with OpenMP simd support)VStoiIntrinsic-vstring::stoi(some part implementated with instrinsics and rest with OpenMP simd)
Running ./vstring_bench Run on (4 X 3100 MHz CPU s) CPU Caches: L1 Data 32K (x2) L1 Instruction 32K (x2) L2 Unified 256K (x2) L3 Unified 3072K (x1) Load Average: 0.92, 1.09, 1.05 ------------------------------------------------------------- Benchmark Time CPU Iterations ------------------------------------------------------------- Atoi<0> 19.6 ns 19.6 ns 41268339 Atoi<1> 22.8 ns 22.8 ns 32894575 Atoi<2> 24.5 ns 24.5 ns 29373132 Atoi<3> 26.8 ns 26.7 ns 24318895 Atoi<4> 29.6 ns 29.6 ns 23678912 Atoi<5> 35.8 ns 35.8 ns 19980500 Atoi<6> 36.4 ns 36.4 ns 18261115 Atoi<7> 40.2 ns 40.2 ns 18080404 Atoi<8> 42.9 ns 42.8 ns 13336815 Atoi<9> 45.3 ns 45.3 ns 14880288 Stoi<0> 19.0 ns 19.0 ns 33468114 Stoi<1> 21.3 ns 21.3 ns 31283041 Stoi<2> 24.8 ns 24.7 ns 28999860 Stoi<3> 27.5 ns 27.5 ns 25007227 Stoi<4> 29.5 ns 29.5 ns 23115277 Stoi<5> 33.1 ns 33.1 ns 21241968 Stoi<6> 35.0 ns 35.0 ns 19328284 Stoi<7> 39.3 ns 39.3 ns 18516857 Stoi<8> 43.5 ns 43.5 ns 16204777 Stoi<9> 43.8 ns 43.8 ns 15975854 VStoi<0> 10.8 ns 10.8 ns 62055430 VStoi<1> 13.1 ns 13.1 ns 57126175 VStoi<2> 14.5 ns 14.5 ns 48849490 VStoi<3> 19.5 ns 19.5 ns 35795502 VStoi<4> 21.4 ns 21.4 ns 32649288 VStoi<5> 21.9 ns 21.9 ns 32154079 VStoi<6> 22.3 ns 22.3 ns 31604697 VStoi<7> 21.7 ns 21.7 ns 32205287 VStoi<8> 23.8 ns 23.8 ns 29113004 VStoi<9> 24.4 ns 24.4 ns 28820527 VStoiIntrinsics<0> 12.2 ns 12.2 ns 56700711 VStoiIntrinsics<1> 14.1 ns 14.1 ns 49328995 VStoiIntrinsics<2> 16.0 ns 16.0 ns 44196694 VStoiIntrinsics<3> 12.5 ns 12.5 ns 55843771 VStoiIntrinsics<4> 15.4 ns 15.4 ns 44830579 VStoiIntrinsics<5> 16.4 ns 16.4 ns 43328013 VStoiIntrinsics<6> 17.8 ns 17.8 ns 37701897 VStoiIntrinsics<7> 12.5 ns 12.4 ns 55005961 VStoiIntrinsics<8> 17.6 ns 17.5 ns 43247715 VStoiIntrinsics<9> 17.4 ns 17.4 ns 40614609