Result shows 0 data

[jorgevrgs]

I've implemented a simple hello world server using Fastify v4.22.2 and tried several times to run autocannon getting data 0:

❯ autocannon --version
autocannon v7.12.0
node v18.17.1

Running:

autocannon -c 100 -d 5 -p 10 <URL>

Results:

However using oha and ab I got data:

oha -n 100 -c10 -z 5s <URL>

Results:

Is there any other useful information I can provide?

[JaoodxD]

Just faced similar issue.
I started test server on wsl2 and run autocannon against it.
As a result of debugging I find out that my wsl had IPv6 url.
If you run autocannon with --debug key you'll find connection refused errors.
Somehow node version affects server oportunity to fallback localhost to IPv6 [::1].
Using newer version of node (20.6.1 in my case) just fixed it.

[ubikapps]

I had this using localhost. I just changed to 127.0.0.1 and it fixed it

[casantosmu]

Can you try upgrading to the latest Node.js version (20) to see if the issue is resolved?