I get what you're saying but you've missed my point. You're optimising your execution but there's trade-offs: you need to think about optimising your software

I get what you're saying but you've missed my point. You're optimising your execution but there's trade-offs: you need to think about optimising your software development model holistically. There's little point in having the most efficient abandonware. A JS tool may be technically suboptimal but that's not a problem unless AST size is a bottleneck. > AST data structures can be implemented much more efficiently with better control over memory layout I assume you're right but I'm not sure I fully understand why this is the case - can you give examples of how a data structure can be implemented in ways that aren't possible in JS?