I added bun and deno. Updated results are on the github page. Deno is similar to node, bun takes much less time.

https://github.com/serpent7776/startup-shutdown-bench

It should be easy to edit the existing code to add support for i18n, but there’s probably no way to make in generic (except for macros).

I can actually define this in TCL:

% proc ifn't {cond cmds} {if {!$cond} {uplevel $cmds}}
% ifn't false {puts 12}
12
% ifn't true {puts 12}
% 

Yeah, that was basically it.

There’s no purpose really. It was more of “wonder if I can” and also nice way to learn custom literals.