Why did Google Photos backup speed drop by 60% on mobile devices?

Introduction

Google Photos' backup speed dropping by 60% on mobile devices is a critical issue that demands immediate attention. This significant performance degradation could lead to user frustration, increased churn, and potential loss of market share. I'll approach this problem systematically, focusing on identifying the root cause, validating hypotheses, and developing both short-term fixes and long-term solutions.

Step 1

Clarifying Questions (3 minutes)

• Looking at the scope, I'm thinking this might be a global issue. Is the 60% drop consistent across all regions and device types?

Why it matters: Helps identify if it's a localized or systemic problem. Expected answer: Consistent across regions but varies by device type. Impact on approach: If localized, we'd focus on regional infrastructure; if global, we'd investigate core systems.

• Considering recent changes, have there been any major updates to the Google Photos app or backend systems in the past month?

Why it matters: Recent changes often correlate with performance issues. Expected answer: A backend update was rolled out two weeks ago. Impact on approach: We'd prioritize investigating the recent update's impact.

• Examining user behavior, has there been a significant change in the types or sizes of photos being backed up?

Why it matters: Changes in content could affect backup performance. Expected answer: No notable changes in photo types or sizes. Impact on approach: We'd focus more on technical issues rather than content-related factors.

• Thinking about network conditions, are we seeing any correlation between backup speed and network type (Wi-Fi vs. cellular)?

Why it matters: Network issues could be a key factor in backup speed. Expected answer: The slowdown is more pronounced on cellular networks. Impact on approach: We'd investigate potential cellular network optimizations.