A simple WIP profiler library for c++. Include the 2 files and you're ready to go.
- Function measurement
- Scope measurement
- Thread-safety
- Duration
- Call counts
- Structured output
Originally, I made this tool while waiting for a system update on a rolling-release OS, because I couldn't install valgrind until everything else was up-to-date.
The tool ended up as a standalone thing with a few specific pros compared to mature industry-standard profilers.
- It is simple and minimal
- You can simply choose the areas of interest for profiling
- Completely portable. It relies only on standard C++17
- It is MUCH faster. since it profiles only select areas of interest, it shouldn't interfere with non-profiled code performance, aside from possible cache misses. Chore timing is taken into account, of course.
No installation is required. Just include the <MMeter repo>/include directory, and add the <MMeter repo>/src/MMeter.cpp file to your build system.
Note: always depend on a specific release. The API might not be stable between releases. If you want a specific 'unreleased' functionality, dependency of a specific commit is also ok.
Usage is simple. Documentation for the functions is in the code comments
Example:
#include "MMeter.h"
#include <iomanip>
#include <iostream>
#include <thread>
int calcInt(int ctr)
{
MMETER_FUNC_PROFILER;
int val = 0;
for (int i = 0; i <= ctr; i++)
val += i;
return val;
}
int calcFloat(int ctr)
{
MMETER_FUNC_PROFILER;
float val = 0;
for (int i = 0; i <= ctr; i++)
val += i;
return val;
}
void test()
{
MMETER_FUNC_PROFILER;
calcInt(50000000);
calcFloat(50000000);
}
int main()
{
std::thread t1([]() {
MMETER_SCOPE_PROFILER("main function subthread");
test();
test();
});
t1.join();
std::cout << std::fixed << std::setprecision(6) << MMeter::getGlobalTreePtr()->totalsByDurationStr() << std::endl;
std::cout << *MMeter::getGlobalTreePtr() << std::endl;
MMeter::getGlobalTreePtr()->outputBranchPercentagesToOStream(std::cout);
}Output:
0.186687s /#2 - calcInt
0.213233s /#2 - calcFloat
0.399922s /#2 - test
0.399923s /#7 - <body>
0.399923s /#1 - main function subthread
0.399923s /#1 - main function subthread
0.000001s /#1 - <body>
0.399922s /#2 - test
0.000003s /#2 - <body>
0.186687s /#2 - calcInt
0.213233s /#2 - calcFloat
0.399923s /#1 - main function subthread
0.000183% /^1.000000 - <body>
99.999817% /^2.000000 - test
0.000673% /^1.000000 - <body>
46.680728% /^1.000000 - calcInt
53.318599% /^1.000000 - calcFloat