Re: Help needed finding large globals

[Alexander Gladysh <agladysh@...>]

> Here's what I finally came up with:
>
> Using table.show from here:  http://lua-users.org/wiki/TableSerialization
> and the logging package:
>
> function dumpLargeGlobals()
>   if not config.dumpLargeGlobals then return end
>   for k,v in pairs(_G) do
>       local v2 = table.show(v,"v")
>       if v2:len() > 3000 and k ~= "_G" and k ~= "package" then
>           logger:debug(table.show({GLOBAL=k,value=v2:len()}))
>       end
>   end
> end
>
> It's not exact, but it gives me a pretty nice relative benchmark.  Here, I'm
> dumping any structure/string whose string representation is > 3K (an
> arbitrary number I chose).
>
> HTH someone else.

Are you sure you do not need to detect large upvalues as well?

Simplest example:

do
  local upvalue = { --[[ something large ]] }

  function my_function() -- global function
    print(tostring(upvalue))
  end
end

Upvalue would not be collected until my_function is collected.

HTH,
Alexander.