When the container is compiled, special logs are generated in a file called usually var/cache/dev/appDevDebugProjectContainerCompiler.log.

Some deprecations can also be triggered at that build time.

Yet, these deprecations are too often forgotten - because they only appear once.
And the mentioned log file is never looked at (did you know it existed at all?)

It would be great if we could have a new profiler panel for these info.

Anyone willing to give it a try?