Hello,

I'd like to suggest cover eval-when-compile subject in terms of package development. Some topics are bellow:

• When a developer should use eval-when-compile despite the fact that at first glance everything works w/o eval-when-compile. I.e. some guidance and best practices
• eval-when-compile and tests. How it affects and helps. When this may leads to unexpected behavior. Please provide some examples
• Is the presence in a package defsubst, defmacro define-inline the reason to use eval-when-compile? Describe why.
• Provide please some anti-patterns or bad practices. When a developer shouldn't use eval-when-compile even this works
• eval-when-compile, autoloading, package building and distributing. How is this related?
• eval-and-compile, eval-when-compile, with-eval-after-load

Thank you