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Dieter Plaetinck 4d27816ea5
Sparsehistogram: improve dod encoding, testing, encode chunk metadata (#9015) 
* factor out different varbit schemes and include Beorn's "optimum" for buckets

Signed-off-by: Dieter Plaetinck <dieter@grafana.com>

* use more compact dod encoding scheme for SHS chunk columns

Signed-off-by: Dieter Plaetinck <dieter@grafana.com>

* remove FB VB and xor dod encoding because we won't use it

Signed-off-by: Dieter Plaetinck <dieter@grafana.com>

* HistoChunk metadata encoding

Signed-off-by: Dieter Plaetinck <dieter@grafana.com>

* add SparseHistogram.Copy()

Signed-off-by: Dieter Plaetinck <dieter@grafana.com>

* histogram test: test appending a few histograms

Signed-off-by: Dieter Plaetinck <dieter@grafana.com>

* add license headers

Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
2021-06-30 16:15:43 +05:30
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Sparsehistogram: improve dod encoding, testing, encode chunk metadata (#9015)
2021-06-30 16:15:43 +05:30