"
Contains several improvements for fast-forwarding and slicing readers. Mainly
for the MC format, but not only:
- Exiting the parser early when going out of the fast-forwarding window [MC-format-only]
- Avoiding reading of the head of the partition when slicing
- Avoiding parsing rows which are going to be skipped [MC-format-only]
"
* 'sstable-mc-optimize-slicing-reads' of github.com:tgrabiec/scylla:
sstables: mc: reader: Skip ignored rows before parsing them
sstables: mc: reader: Call _cells.clear() when row ends rather than when it starts
sstables: mc: mutation_fragment_filter: Take position_in_partition rather than a clustering_row
sstables: mc: reader: Do not call consume_row_marker_and_tombstone() for static rows
sstables: mc: parser: Allow the consumer to skip the whole row
sstables: continuous_data_consumer: Introduce skip()
sstables: continuous_data_consumer: Make position() meaningful inside state_processor::process_state()
sstables: mc: parser: Allocate dynamic_bitset once per read instead of once per row
sstables: reader: Do not read the head of the partition when index can be used
sstables: mc: mutation_fragment_filter: Check the fast-forward window first
sstables: mc: writer: Avoid calling unsigned_vint::serialized_size()
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