bench: introduce -min_time argument

When it is not easily possible to stabilize benchmark machine and code
the argument -min_time can be used to specify a minimum duration
that a benchmark should take. E.g. choose -min_time=1000 if you
are willing to wait about 1 second for each benchmark result.

The default is now set to 10ms instead of 0, which should make runs on
fast machines more stable with negligible slowdown.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/bench/bench.h b/src/bench/bench.h
index c4fcd80e33..3bce23ab6d 100644
--- a/src/bench/bench.h
+++ b/src/bench/bench.h
@@ -43,6 +43,7 @@ typedef std::function<void(Bench&)> BenchFunction;
 struct Args {
     std::string regex_filter;
     bool is_list_only;
+    std::chrono::milliseconds min_time;
     std::vector<double> asymptote;
     std::string output_csv;
     std::string output_json;