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Author SHA1 Message Date
Anton Popov
73676f5022
Improve performace of reading in order of sorting key. (#11696) 
* simplify reading in order of sorting key

* add perf test for reading many parts

* Revert "simplify reading in order of sorting key"

This reverts commit 7267d7c46e.

* add threshold for preliminary merge for reading in order

* better threshold

* limit threads in test
 2020-07-04 15:48:51 +03:00