extract helper methods in worker_analysis stats calculation
extract helper methods in worker_analysis stats calculation
mihailim/image_optim,ramiroaraujo/image_optim,ramiroaraujo/image_optim,ramiroaraujo/image_optim,mihailim/image_optim,toy/image_optim,weheartit/image_optim,weheartit/image_optim,toy/image_optim,toy/image_optim,mihailim/image_optim,weheartit/image_optim