Building a JS Performance Monitoring Tool — Part II

Introduction

We Can Collect Data, Now What?

Meaningful Data Points

Timeline of critical data-points we’re capturing

Finding What Matters Most…

“Above the fold” refers to content seen before a user has scrolled. “Below the fold” is content that exists below the user’s viewport when the page loads.

…And Visualizing It

Data visualization of our JS performance in Looker

Bonus Feature

Performance data that can be viewed for all ad instances

Conclusion

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