R5Bulkheads

The problem

1 s on screen = 100 ms

Recommendations get slow. Why can't anyone check out?

One pool of workers for everything

Each of Shop server's 10 workers waits for its call: Payments for buyers, Recommendations for browsers.

Live metrics for each version of the scene
Metric	One pool	Bulkheads	Change
target ≤ 400 ms	—	—	—
	—	—	—
	0%	0%	—

R5Bulkheads

One slow dependency can eat every worker. Give each dependency its own pool.