gitui/src/profiler.rs

/// helper struct to not pollute main with feature flags shenanigans for the profiler
/// also we make sure to generate a flamegraph on program exit
pub struct Profiler {
    #[cfg(feature = "pprof")]
    #[cfg(not(windows))]
    guard: pprof::ProfilerGuard<'static>,
}

impl Profiler {
    #[allow(clippy::missing_const_for_fn)]
    pub fn new() -> Self {
        Self {
            #[cfg(feature = "pprof")]
            #[cfg(not(windows))]
            guard: pprof::ProfilerGuard::new(100)
                .expect("profiler launch error"),
        }
    }

    #[allow(clippy::unused_self)]
    fn report(&mut self) {
        #[cfg(feature = "pprof")]
        #[cfg(not(windows))]
        if let Ok(report) = self.guard.report().build() {
            let file = std::fs::File::create("flamegraph.svg")
                .expect("flamegraph file err");

            report.flamegraph(&file).expect("flamegraph write err");

            log::info!("profiler reported");
        }
    }
}

impl Drop for Profiler {
    fn drop(&mut self) {
        self.report();
    }
}