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utils: add RAII stopwatch 

For benchmarking
This commit is contained in:
Dirk-Jan C. Binnema 2020-11-26 09:23:52 +02:00
parent 6bda2a12ff
commit 4b6d9a0ce8
1 changed files with 19 additions and 0 deletions
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19
lib/utils/mu-utils.hh
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@ -131,6 +131,25 @@ constexpr int64_t to_s (Duration d) { return to_unit<std::chrono::seconds>(d);
constexpr int64_t to_ms (Duration d) { return to_unit<std::chrono::milliseconds>(d); }
constexpr int64_t to_us (Duration d) { return to_unit<std::chrono::microseconds>(d); }
struct StopWatch {
using Clock = std::chrono::steady_clock;
StopWatch (const std::string name):
start_{Clock::now()},
name_{name} {}
~StopWatch() {
const auto us{to_us(Clock::now()-start_)};
if (us > 2000000)
g_debug ("%s: finished after %0.1f s", name_.c_str(), us/1000000.0);
else if (us > 2000)
g_debug ("%s: finished after %0.1f ms", name_.c_str(), us/1000.0);
else
g_debug ("%s: finished after %" G_GINT64_FORMAT " us", name_.c_str(), us);
}
private:
Clock::time_point start_;
std::string name_;
};
/**
* See g_canonicalize_filename
*