Increased auth performance

[goto3]

Hello, I am a starting with node.js and I found something interesting:

On auth file in routes folder I changed this on line 17:

const validPassword = await bcrypt.compare(req.body.password, user.password);
if (!validPassword) return res.status(400).send("Invalid email or password.");

to this:

await bcrypt.compare(req.body.password, user.password, function(err, result) {
    if (!result) return res.status(400).send("Invalid email or password.");
});

and decreased request processing time from 85 ms to 5 ms average.

Why is that?

Note: I am using bcrypt v3.0.6

Thank you very much

[rustemjantayev]

Because the request was cached. Try run different users ,and you will see.