Function flamescope::write_spans

pub fn write_spans(writer: impl Write, spans: Vec<Span>) -> Result<()>

Dump flame spans to a writer, e.g. a file, specifying the spans you want to write.

flamescope::write_spans(
    &mut File::create("flamescope.json").unwrap(),
    // if you wanted only every other span, for some reason.
    flame::spans()
        .into_iter()
        .enumerate()
        .filter(|(i, _)| i % 2 == 0)
        .map(|(_, span)| span)
        .collect(),
).unwrap();