IFTTT Webhooks: Latency bottleneck and nondeterministic trigger order

Goal

Measure the round‑trip latency of IFTTT Webhook triggers to identify performance bottlenecks before applying optimizations.

Constraints & Uncertainty

• Free plan limits to 10 requests per minute, potentially throttling high‑frequency tests.
• Server‑side processing time is not publicly exposed, making precise latency attribution difficult.
• When multiple triggers fire in rapid succession, IFTTT processes them in an undefined order; the platform does not guarantee FIFO or priority ordering.

Unresolved Questions

1. What is the most reliable method to capture per‑trigger latency, including network and server components, using only the IFTTT History log and external timing tools?
2. Does IFTTT guarantee any deterministic execution order for simultaneous Webhook triggers, or is the order truly nondeterministic?
3. What mitigation strategies can be employed in applet design to avoid race conditions when trigger order is not guaranteed?