| Glob Benchmarks |
| |
| The benchmarks in this directory attempt to provide some guidance for the amount |
| of buffering to use with the channels returned by Glob__ and GlobChildren__. |
| |
| The first set of benchmarks (BenchmarkChanN) shows the relationship between the |
| buffer size and the latency of a very simple channel with one writer and one |
| reader doing nothing else. |
| |
| The second set of benchmarks (BenchmarkGlobN) does the same thing but with a |
| Glob__ server and a Glob client. The third set (BenchmarkGlobChildrenN) uses |
| GlobChildren__. |
| |
| As of 2014-12-03, the conclusion is that the queue size has very little impact |
| on performance. |
| |
| The BenchmarkChanN set shows that increasing the queue size improves latency for |
| the very simple case, but not for Glob__ or GlobChildren__. |
| |
| An interesting observation is that all the benchmarks get slower as the number |
| of cpus increases. |
| |
| Below are the test results for 1, 2, and 4 cpus on a HP Z420 workstation with |
| 2 × 6 cpu cores (Intel(R) Xeon(R) CPU E5-1650 v2 @ 3.50GHz). |
| |
| $ ./glob.test -test.bench=. -test.benchtime=5s -test.cpu=1 |
| BenchmarkChan0 20000000 464 ns/op |
| BenchmarkChan1 20000000 585 ns/op |
| BenchmarkChan2 20000000 484 ns/op |
| BenchmarkChan4 20000000 425 ns/op |
| BenchmarkChan8 50000000 396 ns/op |
| BenchmarkChan16 50000000 381 ns/op |
| BenchmarkChan32 50000000 371 ns/op |
| BenchmarkChan64 50000000 365 ns/op |
| BenchmarkChan128 50000000 363 ns/op |
| BenchmarkChan256 50000000 362 ns/op |
| BenchmarkGlob0 500000 35029 ns/op |
| BenchmarkGlob1 500000 63536 ns/op |
| BenchmarkGlob2 500000 34753 ns/op |
| BenchmarkGlob4 500000 26379 ns/op |
| BenchmarkGlob8 500000 19293 ns/op |
| BenchmarkGlob16 1000000 18149 ns/op |
| BenchmarkGlob32 500000 52364 ns/op |
| BenchmarkGlob64 500000 83879 ns/op |
| BenchmarkGlob128 100000 88448 ns/op |
| BenchmarkGlob256 100000 57922 ns/op |
| BenchmarkGlobChildren0 100000 118448 ns/op |
| BenchmarkGlobChildren1 100000 123274 ns/op |
| BenchmarkGlobChildren2 100000 116110 ns/op |
| BenchmarkGlobChildren4 100000 134175 ns/op |
| BenchmarkGlobChildren8 100000 118776 ns/op |
| BenchmarkGlobChildren16 100000 123191 ns/op |
| BenchmarkGlobChildren32 100000 132195 ns/op |
| BenchmarkGlobChildren64 100000 126004 ns/op |
| BenchmarkGlobChildren128 100000 135072 ns/op |
| BenchmarkGlobChildren256 100000 127399 ns/op |
| |
| $ ./glob.test -test.bench=. -test.benchtime=5s -test.cpu=2 |
| BenchmarkChan0-2 5000000 1595 ns/op |
| BenchmarkChan1-2 5000000 1649 ns/op |
| BenchmarkChan2-2 10000000 1245 ns/op |
| BenchmarkChan4-2 10000000 1299 ns/op |
| BenchmarkChan8-2 10000000 982 ns/op |
| BenchmarkChan16-2 10000000 929 ns/op |
| BenchmarkChan32-2 10000000 916 ns/op |
| BenchmarkChan64-2 10000000 903 ns/op |
| BenchmarkChan128-2 10000000 907 ns/op |
| BenchmarkChan256-2 10000000 914 ns/op |
| BenchmarkGlob0-2 500000 61455 ns/op |
| BenchmarkGlob1-2 500000 46890 ns/op |
| BenchmarkGlob2-2 200000 56462 ns/op |
| BenchmarkGlob4-2 500000 22783 ns/op |
| BenchmarkGlob8-2 200000 64783 ns/op |
| BenchmarkGlob16-2 1000000 68119 ns/op |
| BenchmarkGlob32-2 200000 78611 ns/op |
| BenchmarkGlob64-2 500000 82180 ns/op |
| BenchmarkGlob128-2 1000000 81548 ns/op |
| BenchmarkGlob256-2 100000 88278 ns/op |
| BenchmarkGlobChildren0-2 100000 83188 ns/op |
| BenchmarkGlobChildren1-2 100000 81751 ns/op |
| BenchmarkGlobChildren2-2 100000 81896 ns/op |
| BenchmarkGlobChildren4-2 100000 81857 ns/op |
| BenchmarkGlobChildren8-2 100000 81531 ns/op |
| BenchmarkGlobChildren16-2 100000 89915 ns/op |
| BenchmarkGlobChildren32-2 100000 81112 ns/op |
| BenchmarkGlobChildren64-2 100000 80997 ns/op |
| BenchmarkGlobChildren128-2 100000 81350 ns/op |
| BenchmarkGlobChildren256-2 100000 81344 ns/op |
| |
| $ ./glob.test -test.bench=. -test.benchtime=5s -test.cpu=4 |
| BenchmarkChan0-4 5000000 2012 ns/op |
| BenchmarkChan1-4 5000000 3149 ns/op |
| BenchmarkChan2-4 5000000 1839 ns/op |
| BenchmarkChan4-4 10000000 957 ns/op |
| BenchmarkChan8-4 20000000 660 ns/op |
| BenchmarkChan16-4 20000000 523 ns/op |
| BenchmarkChan32-4 20000000 507 ns/op |
| BenchmarkChan64-4 20000000 509 ns/op |
| BenchmarkChan128-4 20000000 507 ns/op |
| BenchmarkChan256-4 20000000 511 ns/op |
| BenchmarkGlob0-4 100000 103269 ns/op |
| BenchmarkGlob1-4 100000 101222 ns/op |
| BenchmarkGlob2-4 100000 102049 ns/op |
| BenchmarkGlob4-4 100000 102763 ns/op |
| BenchmarkGlob8-4 100000 101939 ns/op |
| BenchmarkGlob16-4 100000 102989 ns/op |
| BenchmarkGlob32-4 100000 103898 ns/op |
| BenchmarkGlob64-4 100000 102838 ns/op |
| BenchmarkGlob128-4 100000 101532 ns/op |
| BenchmarkGlob256-4 100000 101059 ns/op |
| BenchmarkGlobChildren0-4 100000 106617 ns/op |
| BenchmarkGlobChildren1-4 100000 102576 ns/op |
| BenchmarkGlobChildren2-4 100000 106313 ns/op |
| BenchmarkGlobChildren4-4 100000 102774 ns/op |
| BenchmarkGlobChildren8-4 100000 102886 ns/op |
| BenchmarkGlobChildren16-4 100000 106771 ns/op |
| BenchmarkGlobChildren32-4 100000 103309 ns/op |
| BenchmarkGlobChildren64-4 100000 105112 ns/op |
| BenchmarkGlobChildren128-4 100000 102295 ns/op |
| BenchmarkGlobChildren256-4 100000 102951 ns/op |
