symfony/symfony — comment on commit b46114a0f67da3338aa6728f33d20fb11c4da59c
File:  line 0
By vicb:

I think it is to reduce the amount of data stored for each request but I does not have a lot of meaning when the route collection has changed (thinking of an import here).

May be we can store a signature and only display the routes when the signatures matche and display a notice otherwise.