Why did Chrome Browser page load time increase by 200% for HTTPS sites?

Introduction

Chrome's page load time increase of 200% for HTTPS sites is a critical issue that demands immediate attention. This performance degradation significantly impacts user experience and could lead to decreased user engagement and retention. 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 specificity of HTTPS sites, I'm thinking this might be related to SSL/TLS handshake processes. Has there been any recent change in Chrome's SSL/TLS implementation or certificate handling?

Why it matters: SSL/TLS changes could directly impact HTTPS load times. Expected answer: Recent updates to Chrome's security protocols. Impact on approach: If confirmed, we'd focus on recent security-related changes.

• Considering the magnitude of the increase, I'm wondering about potential DNS resolution issues. Have we observed any changes in DNS lookup times or success rates?

Why it matters: DNS problems could cause significant delays across all HTTPS sites. Expected answer: Unusual patterns in DNS resolution times or failure rates. Impact on approach: If DNS issues are confirmed, we'd prioritize network-level investigations.

• Given that this affects Chrome specifically, I'm curious about recent browser updates. Was there a major Chrome version release coinciding with this performance drop?

Why it matters: Browser updates can introduce bugs or unintended performance issues. Expected answer: Information about recent Chrome releases and their timing. Impact on approach: If correlated, we'd focus on changes introduced in the latest update.

• Thinking about potential infrastructure changes, has there been any modification to Chrome's content delivery network or caching mechanisms?

Why it matters: CDN or caching issues could significantly impact page load times. Expected answer: Recent changes to Chrome's content delivery infrastructure. Impact on approach: If confirmed, we'd investigate CDN configuration and caching policies.