more draw call optimisation

module/buffer.lua

@@ -261,7 +261,7 @@ function buffer:read(...)
    io.write("\27[s\27[8m")
    local pos, buffer = 1, ""
    local function redraw()
-    io.write("\27[u"..buffer.." \27[u\27["..tostring((#buffer-pos)+1).."C")
+    io.write(string.format("\27[u%s \27[u\27[%iC",buffer,(#buffer-pos)+1))
    end
    while true do
     char = readBytesOrChars(1)
@@ -270,14 +270,12 @@ function buffer:read(...)
       local args = {""}
       repeat
        char = readBytesOrChars(1)
-       --[[
        if char:match("%d") then
         args[#args] = args[#args]..char
        else
         args[#args] = tonumber(args[#args])
         args[#args+1] = ""
        end
-       ]]
       until not char:match("[%d;]")
       if char == "C" then -- right
        if pos > 1 then