Function elapsed_ms

src/framework/audio/istft_graph.cpp:21–23

using Clock = std::chrono::steady_clock;

double elapsed_ms(const Clock::time_point start, const Clock::time_point end) {
    return std::chrono::duration<double, std::milli>(end - start).count();
}

void require(bool condition, const char * message) {
    if (!condition) {