^ That iFilter looks interesting. Do you know how it performs? I tend to avoid installing much of anything as I've had performance issues in the past with some software and figured it's often not worth it to bother.
Performance? I have no idea (but see below), though Filters have been employed in Windows Indexing for ages.
If I look down the list of Indexing Options-->Advanced-->File Types tab
, I see hundreds of file extensions and literally dozens of file content filters, including, for example:
- Journal File Filter Class.
- XML Paper Specification Filter.
- Office Outlook MSG iFilter.
- PDF XChange PDF iFilter Handler (replaces the proprietary Adobe-provided one, which doesn't seem to work properly).
- Tiff Filter Class.
- ZIP Filter
Amongst the most important (for me) would be the several MS Office document filters (installed by/for MS Office), and the PDF, Tiff and ZIP filters.
I don't yet know of (or have) a 7Zip file content filter.
Some idea of performance can be seen if you take a look at the Event Log for Desktop Search/Index. You will see that, under apparently normal circumstances, it is repeatedly episodically crashing and self-recovering (or getting stuck in a recovering loop!) due to "Index corruption" or similar. Since MS would arguably have probably got the Indexing code down to a fine art by now, my suspicion is that all those Filter plugins might be (could be) making the thing a bit fragile - hence the crashes.