Investigating the UTF-8 on/off performance issues for work. Template::Stash::ForceUTF8 does utf8_on calls to all stash variables, which could be crucial to perfomance to the large-scale site like ours.Looking through TT source code, I came up with the simple hack to add 'use encoding "utf-8"' to the generated code by TT. This solves the utf-8 bytes and string concatination (auto-upgrades from lati