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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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remote	Optimize histogram iterators (#13340 )	10 months ago
buffer.go	Optimize histogram iterators (#13340 )	10 months ago
buffer_test.go	Optimize histogram iterators (#13340 )	10 months ago
fanout.go	storage: skip merging when no remote storage configured	10 months ago
fanout_test.go	golangci-lint: enable testifylint linter (#13254 )	12 months ago
generic.go	Add warnings (and annotations) to PromQL query results (#12152 )	1 year ago
interface.go	Append Created Timestamps (#12733 )	12 months ago
lazy.go	Add warnings (and annotations) to PromQL query results (#12152 )	1 year ago
memoized_iterator.go	Optimize histogram iterators (#13340 )	10 months ago
memoized_iterator_test.go	golangci-lint: enable testifylint linter (#13254 )	12 months ago
merge.go	Optimize histogram iterators (#13340 )	10 months ago
merge_test.go	Optimize histogram iterators (#13340 )	10 months ago
noop.go	Add warnings (and annotations) to PromQL query results (#12152 )	1 year ago
secondary.go	Add warnings (and annotations) to PromQL query results (#12152 )	1 year ago
series.go	Optimize histogram iterators (#13340 )	10 months ago
series_test.go	golangci-lint: enable testifylint linter (#13254 )	12 months ago