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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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api/v1	promtool: allow setting multiple matchers to "promtool tsdb dump" command. (#13296)	11 months ago
ui	remove obsolete build tag	10 months ago
federate.go	Optimize histogram iterators (#13340)	10 months ago
federate_test.go	Enable reusing memory when converting between histogram types	12 months ago
web.go	web : use Go standard package	1 year ago
web_test.go	Added 'limit' query parameter support to /api/v1/status/tsdb endpoint (#12336)	2 years ago