Re: [comp.emacs.xemacs] Package incompatibility

mb> I've been making byte-compiler perfomance improvements to mb> 21.2. All should generate completely compatible code to 21.1. SJT> How quickly you forget. :-( SJT> Granted, you have to write perverted code to tickle those differences. SJT> But people tweaking code across Emacs versions for performance reasons SJT> are surely not "normal". David is probably not going to run into SJT> problems due to your optimization of (+ x 0), but he's more likely to SJT> do so than the average bear, Booboo. :-/ Completely compatible in the sense that if someone's code stops working when compiled with the 21.2 compiler and run under 21.1, then it also stops working when run under 21.2! Broken _compatibly_. I'm sure a smart guy like David wouldn't use (+ x 0) to turn a marker into an integer...