LAB

Two decisions you can move

The picker and the bucket are the two places a service says no. Move the inputs and watch where the line falls.

Power of two choices

src/balance/p2c.mbt — load = trunc(sqrt(lag_ms · 10⁶ + 1)) · (inflight + 1)

instance a 2 ms instance b 2 ms instance c 120 ms calls 300

Token bucket

src/limit/ratelimit.mbt — holds up to burst, refills at rate a second, one token a request

rate 50 /s burst 20 tokens demand 80 /s

Both benches call the library named above, compiled to wasm and loaded by this page: moving a control runs the same code a service runs. The module is built from src/examples/browser by the documentation workflow.