esnme/ultrajson — comment on commit 3ecf8e9b0b97c0a55279fcd0a41e3771861363ee
File:  line 0
By majek:

Can't you invert the 'if' condition and just reuse the same code as for 0x01 to 0x1f?
(I mean, break if io >= END, or continue going down through all the other cases as 0x01 and to escaping in the other case)