check nlines only for biggest build, followup of #4038 (#4108)
check nlines only for biggest build, followup of #4038 (#4108)


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