require

autoload

load

http://ruby-doc.org/core-2.1.0/Kernel.html#method-i-require

http://ruby-doc.org/core-2.1.0/Kernel.html#method-i-autoload

http://ruby-doc.org/core-2.1.0/Kernel.html#method-i-auto

Matz (2011) "discourage the use of autoload"

[...] autoload itself has fundamental flaw under multi-thread environment. I should have remove autoload when I added threads to the language.

[...] I hereby declare the future deprecation of autoload. Ruby will keep autoload for a while, since 2.0 should keep compatibility to 1.9.But you don't expect it will survive further future, e.g. 3.0.I strongly discourage the use of autoload in any standard libraries.

”

https://bugs.ruby-lang.org/issues/5653https://www.ruby-forum.com/topic/3036681

”Peter Cooper: I'll be taking the "cross that bridge when I get to it" approach

What I think after some research...

http://www.rubyinside.com/ruby-techniques-revealed-autoload-1652.html

I‘m full of autoload because the lazy loading feature is awesome...