3 ms·
On my two machines (with SSDs) I regularly find that copying lots of small files is severely slowed down by Windows Defender. It utilizes one core to the max an
by karyon 11y ago
On my two machines (with SSDs) I regularly find that copying lots of small files is severely slowed down by Windows Defender. It utilizes one core to the max and when disabling it, the copy operation gets a lot faster.
I don't know about other antivirus software though.
- ferongr 11y agoI can mirror this experience too. Properly working Intel SSD fwiw. Mine impacts not only file copys but also all small file I/O like listing directories (explorer would hang for 1 second entering a new directory) and the like.
- versteegen 11y agoI've had a couple users complain that my program started running really slowly while they were using Microsoft Security Essentials. It turns out that if a file contains a "suspicious" pattern of bytes (which in these two cases were two different user-drawn bitmaps), SE will do some time consuming heuristics every time you open the file. So opening, reading, closing a file 10 times in a row is really bad.