system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do computers and websites often take a while to detect an incorrect password but often detect correct passwords immediately?

The title is fairly self-explanatory but what I'm mainly getting at is why does it take a computer a while to detect an incorrect password instead of detecting it immediately?
gpt
This is a security measure. If it rejects you in .1 second, you can guess 10 passwords a second. If it rejects you in 3 seconds, it takes you 30 times as long to brute force the password. In many cases, the delay will increase after multiple failed guesses as well.