It's written https://gatk.broadinstitute.org/hc/en-us/articles/360036366272-ReorderSam-Picard- that for the Picard ReorderSam tool, it "Runs substantially faster if the input is an indexed BAM file".
I wanted to ask-What does it mean? Do I need to give the file.bam.bai as input? I tried that, and it didn't work...
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