Change function/field type textbox performance with large type database

[mishka-freddy]

What is the feature you'd like to have? I have huge database with ~1.5kk types. So, when I want to change some function or field type, appears text box where I can do it. But due to type validness check, it makes me hard to write anything by hand, because it stuck for 4+ seconds each time when I type some chars. Maybe there's way to disable type check until I press Change button?