为什么我的django开发服务器在本地运行的速度要比在Heroku上运行同一开发服务器的速度快得多？

Question

I have a website using Django that loads about 100 rows from a single table in a postgresql database when entering it.

Development server locally : Page loaded in 300ms
Production server on Heroku : Page loaded in 1.34secs (about 4.13 times slower) (Integrated gunicorn and loading my static files from aws S3 on a non-idling dyno)

wth?

Note that there is no traffic yet on my production server and I am using 1 dyno.

When I used the exact same setup as my development server for my production server on Heroku it was even slower. Is such a difference in loading time normal?

Specs of my computer :

Memory: 3.7 GiB  
Processor: Intel® Core™ i5 CPU M 520 @ 2.40GHz × 4   
OS type: 64-bit 

Answer 1

If my computer has about 3.9 Gb ram and one dyno indeed has 512Mb ram according to this source , that means my computer has about 7.8 times more ram . According to this source ram is very significant for increasing performance of db queries. Since I'm doing quite a few queries the time difference makes sense to me.

Running top in my heroku app directory surprisingly returns 35 Gb ram though. But according to this source running top in Heroku is performed from a different dyno(one-off dyno) your app is running on.

The only thing I don't understand now is why a one-off dyno has so much ram.

As long as nobody gives a better answer I'll keep this answer checked.