Outputs reads overlapping specified region into new BAM file. (Default destination is STDOUT.) Input file
must be coordinate-sorted and indexed.
While the same can be done with sambamba-view, that would be much slower due to a lot of
compression/decompression work. Instead of naive method, sambamba-slice leverages knowledge about
structure of BAM file and recompresses only a few BGZF blocks at the beginning and the end of the region,
while the BGZF blocks in the middle are copied as is. As such, this tool doesn´t offer any options
related to number of threads or compression level - most of the time is spent on I/O operations.