iOS Build Times 3x slower than local developer machine

I am experiencing long build times in Travis (3x longer than local developer machine) and I’m curious if anything has changed since this ticket went stale in Fall 2018:

We would like this build time to improve if possible, but it seems that it may be a service resource constraint.

Please include links to builds for us to be able to say anything specific.

Among unspecific things, if your hardware is more powerful than Travis builders – especially the number of cores if you’re using parallel builds – different build times are to be expected.

To localize the sources of the discrepancy, time the stages of your build.