Is heroku dyno really that slow?

Question

I was using a heroku nodejs express app, and i added a little piece of code to most data intensive endpoints that basically gets a time at the start and send it with the request in a property of time.

{
...,
time: <time taken in ms>
}

i found that this fluctuated between 300ms-350ms, while my TTFB on postman and simple fetch ranged from 800ms to 1500ms. Is heroku really that slow in latency even on a paid hobby dyno?

for comparison i bought a 1 core 1 gb ram machine on the cloud, and it's time values were between 150-190 ms. the TTFB was also consistently around 400ms-420ms. This is costing me less than 7$ a month that heroku charges.

Another question i had was that heroku promises the same specs that i rented, but the rented machine was faster... how is that possible?

so is there any problem at my end? or any misconfigurations or something i may have made? as the only real benefit of heroku i can see right now is automatic deploys.

sorry if this is a bad question, tried to find solutions to this but no other person had either had this issue or perhaps something wrong at my end.