Latency-Collector

Easy-to-use latency collecting library for C++ programs.

Author

Jung-Sang Ahn [email protected]

How to Use

Copy all files in src to your source repository.

Collecting latencies:

#include "latency_collector.h"

// Define a collector.
static LatencyCollector lat_clt;

void my_function() {
    // It will collect the latency of this function.
    collectFuncLatency(&lat_clt);
    // ... your code to measure latency ...
}

void another_function() {
   // ...
   {
       // It will collect the latency of this block.
       collectBlockLatency(&lat_clt, "latency name");
       // ... your code to measure latency ...
   }
}

How to dump (using the default dump implementation):

#include "latency_dump.h"

int main() {
    // ...
    LatencyDumpDefaultImpl default_dump;
    std::cout << lat_clt.dump(&default_dump) << std::endl;
    // ...
}

It will print out the results as follows:

STAT NAME   :    TOTAL   RATIO  CALLS  AVERAGE      p50      p99    p99.9
my_function : 131.1 ms     ---    100   1.3 ms   1.2 ms   3.5 ms   4.7 ms
latency name:   501 us     ---    100     5 us     4 us    10 us   120 us

Please refer to examples/quick_start.cc or tests/latency_test.cc for more details.