fn window_quantile(
values: &[f64],
quantile: f64,
scratch: &mut Vec<f64>,
) -> Option<f64>Expand description
Quantile of one range window, or None when the window holds no sample.
Prometheus returns an empty vector for a range without float samples rather than the NaN
that quantile_impl yields for an empty slice, so the emptiness check belongs here and
not in the shared kernel.