Added a code optimization to the routine to generate percentage_snps.csv
Added a code optimization to the routine to generate percentage_snps.csv

benranco/SNPpipeline,benranco/SNPpipeline,benranco/SNPpipeline,benranco/SNPpipeline,benranco/SNPpipeline,benranco/SNPpipeline,benranco/SNPpipeline,benranco/SNPpipeline,benranco/SNPpipeline