Why has the average setup time for new Tailscale networks increased by 45 seconds this quarter?

Introduction

The recent increase in average setup time for new Tailscale networks by 45 seconds this quarter is a concerning trend that requires immediate attention. As we dive into this issue, we'll follow a systematic approach to identify, validate, and address the root cause while considering both short-term fixes and long-term implications for our product strategy.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking this might be related to recent product changes. Have there been any significant updates to the Tailscale network setup process in the last quarter?

Why it matters: Recent changes could directly impact setup time. Expected answer: Yes, we implemented a new security feature. Impact on approach: If yes, we'd focus on the new feature's performance.

• Considering user segments, I'm curious about the distribution of this increase. Is the 45-second increase consistent across all user types, or are certain segments more affected?

Why it matters: Helps identify if it's a universal issue or specific to certain users. Expected answer: Enterprise users are experiencing longer delays. Impact on approach: If segmented, we'd tailor our solution to the most affected groups.

• Thinking about system performance, has there been any change in server load or network conditions that might explain this increase?

Why it matters: Infrastructure issues could be causing the slowdown. Expected answer: No significant changes in server load noted. Impact on approach: If no, we'd focus more on client-side or process-related issues.

• Regarding measurement accuracy, has there been any change in how we're tracking or calculating setup time?

Why it matters: Ensures we're comparing apples to apples in our metrics. Expected answer: No changes in measurement methodology. Impact on approach: If changed, we'd need to reassess our baseline metrics.