forder speedup for character
forder speedup for character

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