Add exponential histogram support to the cumulative-to-delta processor#44106
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TylerHelmuth merged 9 commits intoopen-telemetry:mainfrom Nov 19, 2025
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I cant verify the math, but the hookup looks good.
# Conflicts: # processor/cumulativetodeltaprocessor/README.md # processor/cumulativetodeltaprocessor/go.mod
TylerHelmuth
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Description
This PR adds support for exponential histograms to the cumulative-to-delta processor, which currently lacks it.
Along the way, I also:
pdatatestso thatniland an empty slice are considered equal for exponential histogram buckets, since (as far as I know) they have the same semantics. This is somewhat necessary because a newly-createdpcommon.UInt64Slicewill be nil, but once filled, there is no way to reset it back to nil: the best you get is an empty slice.convertHistogramDataPointsto take a typed argument instead ofany, like was done in [chore] avoid unnecessary use of any in CumulativeToDeltaProcessor #35166.Link to tracking issue
N/A
Testing
I added two simple test cases to the existing test.
Documentation
I updated the README to reflect the added support.