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c9e1694c58
The set contains 3 small optimizations: - avoid copying of partition key on lookup path - reduce number of args carried around when creating a new entry - save one partition key comparison on reader creation Plus related satellite cleanups. * https://github.com/xemul/scylla/tree/br-row-cache-less-copies: row_cache: Revive do_find_or_create_entry concepts populating reader: Do not copy decorated key too early populating reader: Less allocator switching on population populating reader: Fix indentation after previous patch row_cache: Move missing entry creation into helper test: Lookup an existing entry with its own helper row_cache: Do not copy partition tombstone when creating cache entry row_cache: Kill incomplete_tag row_cache: Save one key compare on direct hit