fread - reduced overhead of select= checking for dups
fread - reduced overhead of select= checking for dups

jangorecki/data.table,vlulla/data.table,vlulla/data.table,vlulla/data.table,Rdatatable/data.table,Rdatatable/data.table,Rdatatable/data.table,jangorecki/data.table,jangorecki/data.table,jangorecki/data.table,vlulla/data.table,Rdatatable/data.table