RCORE-2076 Introducing bitfield iterator for accessing unaligned values for compressed arrays (#7571)

* update next-major

* specified part of new layout (new width encoding)

* new header format for compressed arrays

* code review

* code review

* start of classifying arrays for compression

* classification down to column types

* first attempt to cut through the BPlusTree madness

* [wip] start on 'type driven' write process

* all tests passing (but no compression enabled)

* enabled compression for signed integer leafs only

* removed some dubious constructions in cluster tree

* delete tmp array while classifying arrays

* enabled compression of links and backlinks (excl collections)

* also compress bplustree of integers/links (experimental)

* pref for compressing dicts (not working)

* wip

* wip

* finally: compressing collections (incl dicts)

* compressing timestamps now

* enabled compression on ObjectID, TypedLink and UUID

* also compressing Mixed properties (not list/dicts of Mixed)

* Array compression with collections in Mixed (#7412)

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Co-authored-by: Finn Schiermer Andersen <[email protected]>

* merge next-major + collection in mixed

* enable dynamic choice of compression method

* moved typed_write/typed_print for bptree into class

* Merge pull request #7432 from realm/fsa/clean_typed_write

moved typed_write/typed_print for bptree into class

* cleanup unrelated code changes

* fix compilation

* cleanup

* code review

* code review

* scaffolding for accessing unaligned memory inside compressed arrays

* introducing parallel scan for scanning in one go multiple compressed arrays

* Silence warning

* tests + point fix for upper bound

* fix ubsan

* remove dead code in subword search

* remove tests of 'unaligned iterator' for flexibility

* Some fixes to conform with coding polycies

* Enhance test

* bugfix for serch with width=31 bits

* bugfix for search with width=31 bits

* bugfix for search with width=31 bits

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Co-authored-by: Finn Schiermer Andersen <[email protected]>
Co-authored-by: Jørgen Edelbo <[email protected]>
Co-authored-by: Finn Schiermer Andersen <[email protected]>

Author: 3 people