Slow with basic authentication

[Sebas tech]

Enabled the basic authentication as per v2.24.

Loading a dashboard in Grafana is a lot slower now with the node-exporter graphs appearing slowly one by one. Is this to be expected because maybe (a guess) each query has to be authenticated now or is this not normal?

[Julien Pivotto]

Hello,

Yes this is an issue due to bcrypt. As a workaround you can reduce the
roundtrips to 4.

I also note that Prometheus is not the only one to have this issue, e.g.
caddy had that too:
https://github.com/caddyserver/caddy/issues/3462
Which they fixed by 'caching' the passwords:
https://github.com/caddyserver/caddy/commit/9a7756c6e4b4ddb945bede3ddb2dfbf241208915

I will probably propose such an implementation so further
implementations hopefully see improvements in that regards.

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Julien Pivotto
@roidelapluie

[Sebas tech]

Thanks! Using 4 now. The performance improved a lot.

Hopefully with your proposal implementation the performance will be close to no auth.

[Julien Pivotto]

Hello Sebas,

Can you please upgrade to 2.24.1 which solves the issue.

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--
Julien Pivotto
@roidelapluie