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Frequently Asked Questions
Does Koa replace Express?
It's more like Connect, but a lot of the Express goodies were moved to the middleware level in Koa to help form a stronger foundation. This makes middleware more enjoyable and less error-prone to write, for the entire stack, not just the end application code.
Typically many middleware would re-implement similar features, or even worse incorrectly implement them, when features like signed cookie secrets among others are typically application-specific, not middleware specific.
Does Koa replace Connect?
No, just a different take on similar functionality now that generators allow us to write code with less callbacks. Connect is equally capable, and some may still prefer it, it's up to what you prefer.
Do Generators Decrease Performance?
Barely - check out the benchmarks in our readme, the numbers are more than fine, and there's no substition for proper horizontal scaling.