Normalization using parallel R script
The scran::quickCluster method has a BPPARAM (i.e., BiocParallelParam), so if one provides something like

clusters &lt;- quickCluster(sce, BPPARAM=BiocParallel::MulticoreParam())


it will use all available cores (a specific number of cores can also be given). See the intro doc to BiocParallel for info on other options.