diff --git a/function.lua b/function.lua
index c42f2fb..c591b7d 100644
--- a/function.lua
+++ b/function.lua
@@ -78,6 +78,8 @@ local FUNCTION_DEFINITION_MATCH = '.-'   .. -- Look for stuff before the functio
 	'[ \t]*(.+)[ \t]*'                   .. -- Look for the function body
 	'end'                                   -- Look for the end keyword
 
+local LUA_FILE_PATTERN = '^%s*[%w_]+.lua%s*$'
+
 local NR_CHARS_IN_LONG_FUNCTION_BODY = 30
 
 --------------------------------------------------------------------------------
@@ -109,11 +111,11 @@ local function get_function_info (f)
         end
     end
 
-    if     info.source:sub(1,1) == '=' then  info.defined_how = 'C'
-	elseif info.source:sub(1,1) == '@' then  info.defined_how = 'file'
-    elseif info.source:find'^%w+.lua$' then  info.defined_how = 'file'    -- Hotfix for Love2d boot.lua issue.
-    else                                     info.defined_how = 'string'
-    end
+	if	info.source:sub(1,1) == '='	then	info.defined_how = 'C'
+	elseif	info.source:sub(1,1) == '@'	then	info.defined_how = 'file'
+	elseif	info.source:find(LUA_FILE_PATTERN)	then	info.defined_how = 'file'    -- Fix for when someone has misunderstood the source format is for.
+	else			info.defined_how = 'string'
+	end
 
     if info.builtin and LIBRARY[f] then
         info.name       = LIBRARY[f].name
@@ -284,7 +286,10 @@ return function (value, depth, l, format_value)
 
 	local function_params, function_body  =  nil, '...'
 
-	if not info.docs and info.defined_how ~= 'C' then
+	if not info.docs and info.defined_how ~= 'C' and (depth == 0 or info.defined_how == 'string') then
+		-- Only look for documentation, when at depth 0, or when defined in
+		-- string. We don't want to open a ton of files constantly when
+		-- formatting a table.
 		info = get_function_body_info(info)
 
 		if info.body and #info.body <= NR_CHARS_IN_LONG_FUNCTION_BODY and not info.body:find '\n' and not info.body:find(FUNCTION_KEYWORD_MATCH) then