Hello team, I'm new to Growthbook, wondering what is the best practice if I need to run A/B test across multiple services. Do I obtain experiment assignment in every service? Or I only obtain once and pass the assignment to downstream services? Any suggestions? Thanks!

do you have a persistent identifier that is available across your services?

yes, I have persistent identifier, my intention is to do assignments on every service, the only problem is the downstream need to call growthbook service for every incoming request, imaging the service has many different upstream services, then calling growthbook can be a bottleneck here.

you can cache the payload heavily

I see, that makes things easier, thanks