To simulate excess CPU usage, we will add the following two lines to the main.cc file of the preceding example project before the return statement:
// waste timewasteCpuCycles();return app.exec();
The wasteCpuCycles() function will waste time with floating-point divisions in the following manner:
void wasteCpuCycles(){ size_t count = 10000000; double result = 0; for(size_t i = 0; i < count; ++i) { result += i / 2.33; } qDebug() << QString("Wasted %1 divisions, result=%2") .arg(count).arg(result);}
First, we will try out the Very Sleepy profiler. To install it, go to https://github.com/VerySleepy/verysleepy. Because, at the time of writing, the last released version, v0.90, cannot read the debug information of ...
