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Tested: Microsoft just debloated Windows 11 Search without Bing, and it's crazy fast
(www.windowslatest.com)
This is a most excellent place for technology news and articles.
Everything could do this but sometimes you don't want to.
i.e. you're trading off the background indexing resource usage for instant search results, if you're not frequently searching but are frequently using most of your resources (like let's say on a web server), then that may not be a tradeoff worth making.
NTFS drives have an index built-in. It's not fit for search, but it comes with a journal and you can update a search index incrementally. That's what Voidtools Everything does. It's very fast and doesn't need a background index. (I assume modern Linux drive formats can do the same)