fn generate_splits_fast(
sstable_infos: &Vec<SstableInfo>,
compaction_size: u64,
context: &CompactorContext,
max_sub_compaction: u32,
) -> Vec<KeyRange>
fn generate_splits_fast(
sstable_infos: &Vec<SstableInfo>,
compaction_size: u64,
context: &CompactorContext,
max_sub_compaction: u32,
) -> Vec<KeyRange>