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Filip Petkovski 583f3e587c Optimize histogram iterators (#13340) ... Optimize histogram iterators Histogram iterators allocate new objects in the AtHistogram and AtFloatHistogram methods, which makes calculating rates over long ranges expensive. In #13215 we allowed an existing object to be reused when converting an integer histogram to a float histogram. This commit follows the same idea and allows injecting an existing object in the AtHistogram and AtFloatHistogram methods. When the injected value is nil, iterators allocate new histograms, otherwise they populate and return the injected object. The commit also adds a CopyTo method to Histogram and FloatHistogram which is used in the BufferedIterator to overwrite items in the ring instead of making new copies. Note that a specialized HPoint pool is needed for all of this to work (`matrixSelectorHPool`). --------- Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com> Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>		10 months ago
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bstream.go	enable gocritic, unconvert and unused linters	2 years ago
bstream_test.go	Testify: move to require (#8122)	4 years ago
chunk.go	Optimize histogram iterators (#13340)	10 months ago
chunk_test.go	tsdb: use Go standard errors	12 months ago
float_histogram.go	Optimize histogram iterators (#13340)	10 months ago
float_histogram_test.go	Optimize histogram iterators (#13340)	10 months ago
histogram.go	Optimize histogram iterators (#13340)	10 months ago
histogram_meta.go	ci(lint): enable godot; append dot at the end of comments	1 year ago
histogram_meta_test.go	histograms: General readability tweaks	2 years ago
histogram_test.go	Optimize histogram iterators (#13340)	10 months ago
varbit.go	tsdb/chunkenc: use Go standard errors package	1 year ago
varbit_test.go	Use more varbit in histogram chunks	3 years ago
xor.go	Optimize histogram iterators (#13340)	10 months ago
xor_test.go	chunkenc: Slightly optimize xorWrite/xoRead (#11476)	2 years ago