Thanks for this PR / I will review! .. but first I want to get #2981 reviewed and merged / if it is OK for you.

As long we do not see any drawbacks in using pytomlpp I'm not sure we should remove it .. its 4 times faster compared to the pure python implementation in py3.11.

However if we want less dependencies we should replace pytomlpp by tomli in py < 3.11 / tomli is the tomllib module that has been added to the standard library in Python 3.11 and the compatibility layer is simpler, compared the one we need for pytomlpp & standard library.

its 4 times faster compared to the pure python implementation in py3.11.

I don't think config loading is the SearXNG startup time bottleneck.

if we want less dependencies we should replace pytomlpp by tomli in py < 3.11

I agree: tomli is a written in pure Python, so there is no additional build time for "uncommon" architectures.

Real pleasure. Building pytomlpp for ARM on alpine Linux takes ages!

Is this PR ready :)?