JS is pretty fast nowdays. I _guess_ you could make it 2x as fast by using C++ instead but on the other hand the code might be harder to write and contain more

JS is pretty fast nowdays. I _guess_ you could make it 2x as fast by using C++ instead but on the other hand the code might be harder to write and contain more bugs. These tools are used by houndreds of thousands developers and if the bug count goes up and the development of the tools slows down the tool would probably just loose out to the existing js-based tools. Just my thoughts.