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I used to write extensively with C++, but it has been a long time since speed mattered that much to one of my applications. I still marvel at the cache-level optimizations some people come up with, but I’m in the same mindset as you now.
My workload split of Data Movement vs Data Transformation is like 95:5 these days, which means almost all the optimizations I do are changing batch/cache/page/filter settings. I can do that in any language with http bindings, so I choose those that are faster to write.
Any mod recommendations for a 5 year old? He’s got a laptop with Debian on it and I’d like to set him up with MineTest, but I’m not sure he can handle the full MineClonia experience.