Cypress 'cy.intercept()' latency spikes under concurrent requests

Cypress 'cy.intercept()' latency spikes under concurrent requests

Goal: determine why network latency increases only when multiple requests are issued simultaneously in a test run.

Constraints: Cypress runs commands in the same event loop as the application, uses a single‑threaded proxy to intercept network traffic, and distributes tests across machines for parallelization rather than within a single browser instance.

Uncertainty: Is the latency due to the proxy’s serialization of intercepted requests, the browser’s event‑loop handling, or an internal Cypress throttling mechanism?

Specific Questions

• Does the Cypress proxy incur cumulative overhead when handling several concurrent cy.intercept() calls?
• Is the observed delay caused by the browser’s event loop being blocked by Cypress command execution?
• Would splitting tests into separate files and running them in parallel reduce the latency, indicating an internal queuing issue?