koa-lite/docs/faq.md
2013-12-18 23:08:50 -08:00

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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.