in src/metrics/meter.rs [316:330]
fn find_bucket(&self, value: f64) -> Option<usize> {
match self
.buckets
.binary_search_by(|bucket| bucket.bucket.partial_cmp(&value).unwrap_or(Equal))
{
Ok(i) => Some(i),
Err(i) => {
if i >= 1 {
Some(i - 1)
} else {
None
}
}
}
}