two small windows c programs that test some branching stuff with and without openmp
results using clang -O0/3 -march=x86-64-v4 (-fopenmp) with times from my 9950x3d
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| O0: | O3: |
| | |
| sorted branching: | sorted branching: |
| sorting time: 0.001000 | sorting time: 0.001000 |
| time: 24.658000, sum = 143810716347133 | time : 4.970000, sum = 3167413000000 |
| | |
| sorted branching 2: | sorted branching 2: |
| sorting time: 0.001000 | sorting time: 0.001000 |
| time: 28.632000, sum = 3111741000000 | time: 1.850000, sum = 3167413000000 |
| | |
| sorted branchless: | sorted branchless: |
| sorting time: 0.001000 | sorting time:0.0010000 |
| time: 29.768000, sum = 3111741000000 | time: 1.853000, sum = 3167413000000 |
| | |
| unsorted branching: | unsorted branching: |
| time: 58.103000, sum = 3111741000000 | time: 12.612000, sum = 143867524565520 |
| | |
| unsorted branching 2: | unsorted branching 2: |
| time: 76.905000, sum = 3111741000000 | time: 1.859000, sum = 3167413000000 |
| | |
| unsorted branchless: | unsorted branchless: |
| time: 30.198000, sum = 3111741000000 | time: 1.863000, sum = 3167413000000 |
| | |
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| O0omp: | O3omp: |
| | |
| sorted branching: | sorted branching: |
| sorting time: 0.001264 | sorting time: 0.001226 |
| time taken: 1.784808, sum = 3137536000000 | time: 0.458700, sum = 313753600000 |
| | |
| sorted branching 2: | sorted branching 2: |
| sorting time: 0.001679 | sorting time: 0.001711 |
| time taken: 2.089344, sum: 3137536000000 | time: 0.146047, sum = 3137536000000 |
| | |
| sorted branchless: | sorted branchless: |
| sorting time: 0.001741 | sorting time: 0.001706 |
| time taken: 2.051072, sum: 3137536000000 | time: 0.150383, sum = 3137536000000 |
| | |
| unsorted branching: | unsorted branching: |
| time taken: 1.545571, sum: 3137536000000 | time: 0.601991, sum = 3137536000000 |
| | |
| unsorted branching 2: | unsorted branching 2: |
| time taken: 1.936755, sum: 3137536000000 | time: 0.158733, sum = 3137536000000 |
| | |
| unsorted branchless: | unsorted branchless: |
| time taken: 2.260621, sum: 3137536000000 | time: 0.148286, sum = 3137536000000 |
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