I worked on a runtime assembler based on C++ that worked like this. The nice thing is you could dynamically generate code from C++. Which made hardware shader

I worked on a runtime assembler based on C++ that worked like this. The nice thing is you could dynamically generate code from C++. Which made hardware shader languages run at an acceptable speed on CPUs. Because rather than have branches in your code to support thousands of possible combinations of inputs, you would generate the exact code needed for that data and function. Strangely I still sometimes use some of these assembler techniques in JavaScript to great effect. Want to loop faster? Use something like duffs device. Have lots of ifs/elses in a loop? Parse it out, and make specific code for the inputs at runtime. Not often, but sometimes it's been helpful to improve things.