Feature request: ASCII-optimized case-insensitive comparison in the ascii package

Feature request: ASCII-optimized case-insensitive comparison in the ascii package: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm working on a hot path that does a lot of case-insensitive comparisons of short ASCII strings — think matching HTTP header names…