[Lazarus] filesystem timing Linux vs Win

Martin lazarus at mfriebe.de
Sat Nov 27 18:34:21 CET 2010


On 27/11/2010 17:22, Sven Barth wrote:
> On 27.11.2010 18:16, J├╝rgen Hestermann wrote:
>>
>>> Calling the system to ask for the last-modification time that often
>>> (even with all/most data cached by the OS) would take that long on
>>> Windows, while under Linux it wouldn't even take a single second...
>>
>> But how does it come that there can be such a difference doing nearly
>> the same things on Linux and Windows? I can't believe that Windows is
>> *such* a bad design. They all cook with water I think.
>
> It would be interesting to see a comparison on the same filesystem. 
> E.g. fat32 or ext2 (using ext2ifs). NTFS is a bad example because it 
> is implemented on Linux using a user file system driver (fuse), which 
> might influence the performance test.
>
> @Martin: How does the IDE ask for the last modification time (on Linux 
> and on Windows)? I can then crawl through the source code (for Windows 
> using ReactOS) to see what both OSes are basically doing.
I don't remember, I can't even find the bug at the moment.

It was somewhere in codetools. It was invoked when you tried to do 
implementation-jump. I vaguely remember  Codetool was not caching this 
info, so potentially asking several times for the same file.. A cache 
was added, and things go better.




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