Comment by scottlamb

Opened the link. Saw my own comment. I'm still as confused today as I was then about how this was ever supposed to work—either the quoted code is wrong or there's some weird unstated interface contract. I gather from other issues the maintainers are uninterested in a semver break any time soon. Unsure if they'd accept a performance regression (even if it makes the thing actually work). So I feel stuck. In the meantime, I don't use per-layer filtering. That's a trap.

I've got a whole list of puzzling bugs in the tracing <-> opentelemetry <-> datadog linkage.