Yes i agree with that one most people don't need, they should first use a profiler. Then they can easily improve the performance by 10x. For example I optimize

Yes i agree with that one most people don't need, they should first use a profiler. Then they can easily improve the performance by 10x. For example I optimized a calculation with python dataframes by monkeypatching the 'unique' method so it would skip the sort, since my data was already sorted. This gained me a 5% performance improvement. (there where a few other tricks which reduced the calculation time from 3h to 20m making iterating faster) So i guess the assembly part is just a personal interest and it is only useful for the most inner loop of a program which you can't avoid. It seems that in general using SIMDs/intrinsic is already in the very advanced playbook of a developer. Just like reflection, classpath scanning etc, GPU acceleration. Ideally the standard library should provide the fastest JSON/YAML/CSV parser so no other attempts are made to improve on the standard. I suspect your argument could even be used if you need performance it might be easier to just switch languages. Somebody was super exiting to me that he used a javascript lib which generated optimized code for SQL queries deserialization at runtime. I bluntly said well shouldn't you just use another language to avoid this complexity. Curious question, Why did you read assembly often in your career?