Choosing Between RSpec's Lazy let and Eager let! to Minimize Latency in Concurrent Test Runs
The goal is to select either RSpec's lazy let or eager let! helper so that test suites exhibit minimal latency when executed under simulated concurrent request loads, while preserving test isolation. Using let defers setup until the helper is first referenced, which can reduce per‑example CPU usage in parallel workers but may hide ordering dependencies that
rspec