The Go code size is pretty small, in fact it might be smaller than the Rails code... I'm still trying to find all the Ruby files, Go is in one file...
Mojolicious[1], Dancer[2] and Kelp[3] have set the bar for small code size for me. Not sure yet if there are smaller ones (note that there are no other files required for those apps, period)
In the same vein, Lua's OpenResty[4] looks good, as do Tornado[5], Flask[6] and Bottle[7] (although you need to tease the raw/ORM methods apart to get an idea for the last two). And of course, Sinatra[8].
There probably a lot more, especially for PHP, but I didn't feel like going through that list.
[1]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
[2]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
[3]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
[4]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
[5]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
[6]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
[7]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
[8]: https://github.com/TechEmpower/FrameworkBenchmarks/blob/mast...
You've basically just listed Perl 3 times though. Particularly when the guts of the code in all 3 of those examples was Perl's standard database interface (the same DBI you'd use for CGI Perl or even standalone .pl scripts).
I do love Perl for the flexibility of it's syntax and how concise the code can be. But for me the performance of Go won out. And while mod_perl* does make great gains in performance, it also makes the code a lot less portable (unlike Go). So I found myself porting my performance critical webapps over to Go
* I've not tried Mojolicious, Dancer nor Kelp so I couldn't comment on how they compare for performance.
You realize that Go implements the new template test right? Your linked ones do not (at least the ones I spot checked).
Also, Go is statically typed = win
