rails/rails — comment on commit 12be0a59856d4f92a85c479843e296342be47789
File:  line 0
By kennyj:

Hey, guys !
Thanks for your many discussions. I was sleeping...

Sorry, a commit message was not appropriate.
My patch purpose was consist of two point.

1: less memory consumption (and less memory allocation time)
=> I thought that we should extract constant.

2: avoid someone accidentally changing it
=> I thought that we should freeze constants.