Rust... took me while to install. I decided I did not like curl | sh, so I created fresh VM for that. That took a while, and in the end I ran curl | sh, anyway. I coded weather forecast core in Rust... And I feel like every second line needs explicit typecast. Not nice, but ok; result will be fast, right? Rust: 6m45 seconds, python less then 1m7 seconds. Ouch. Ok, rust really needs optimalizations to be anywhere near reasonable run-time speed. 7 seconds optimized. Compile time is... 4 seconds for 450 lines of code. Hmm. Not great. .. but I guess better than alternatives.