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// a demo target for the flame-chart timeline: a nest of functions that call one
// another so the timeline has real depth. main is the outermost (bottom row),
// each callee stacks a row higher
#include <chrono>
#include <cstdio>
#include <thread>
// innermost: a chunk of busywork so the leaf calls have visible width
auto leaf(int n) -> long
{
long total = 0;
for (int i = 0; i < n * 60000; ++i)
total += i % 7;
return total;
}
// calls leaf a few times
auto inner(int round) -> long
{
long total = 0;
for (int i = 1; i <= 3; ++i)
total += leaf(round % 4 + i);
return total;
}
// calls inner, one level below main
auto outer(int round) -> long
{
const long a = inner(round);
std::this_thread::sleep_for(std::chrono::milliseconds(30));
const long b = inner(round + 1);
return a + b;
}
auto main() -> int
{
for (int round = 0; round < 20; ++round)
{
const long result = outer(round);
std::printf("round %d -> %ld\n", round, result);
std::fflush(stdout);
std::this_thread::sleep_for(std::chrono::milliseconds(150));
}
std::puts("done");
}
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