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0e5b86d3da
Reversing the whole range_tombstone_list into reversed_range_tombstones is inefficient and can lead to reactor stalls with a large number of range tombstones. Instead, iterate over the range_tombsotne_list in reverse direction and reverse each range_tombstone as we go, keeping the result in the optional cookie.reversed_rt member. While at it, this series contains some other cleanups on this path to improve the code readability and maybe make the compiler's life easier as for optimizing the cleaned-up code. Closes #11271 * github.com:scylladb/scylladb: mutation: consume_clustering_fragments: get rid of reversed_range_tombstones; mutation: consume_clustering_fragments: reindent mutation: consume_clustering_fragments: shuffle emit_rt logic around mutation: consume, consume_gently: simplify partition_start logic mutation: consume_clustering_fragments: pass iterators to mutation_consume_cookie ctor mutation: consume_clustering_fragments: keep the reversed schema in cookie mutation: clustering_iterators: get rid of current_rt mutation_test: test_mutation_consume_position_monotonicity: test also consume_gently