id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
1923	Memory consumption while FileOpen/FileClose	anonymous	Jon	"Prerequisite ... create file ""$File"" and deny yourself read/write rights on it (any file will do, can be empty).

Function ""_Test2()"" doesn't consume much memory while function ""_Test1()"" uses more and more memory ...
{{{
While 'TEST'
 _Test1(@ScriptDir & '\test.txt')
WEnd
Exit

Func _Test1($File = '')
 $FileHandle = FileOpen ($File, 0)
  FileReadLine ($FileHandle, 1)
 FileClose ($FileHandle)
EndFunc ;=>_Test1

Func _Test2($File = '')
 FileReadLine ($File, 1)
EndFunc ;=>_Test2
}}}

If you could read this topic and see the full code:
http://www.autoitscript.com/forum/topic/128370-script-memory-usage/
"	Bug	closed	3.3.7.0	AutoIt	3.3.6.1	None	Fixed	memory consumption