Performance & Benchmarks

Virtual DOM Differencing Benchmarks: How ReMOAT Achieves 96% Smaller Footprint than LogRocket

By Vivek Shankhdhar • Head of Quality Assurance & Performance Engineering

Published on August 18, 2026 • 5 min read

Key Takeaways & Executive Summary

Frontend performance budgets are tight. Adding a 150KB monitoring agent that constantly scans the DOM can cause frame drops and degrade Google Core Web Vitals (LCP and INP).

1. The MutationObserver Batching Strategy

ReMOAT uses aggressive requestAnimationFrame debouncing to batch multiple DOM micro-mutations into single binary transfer frames.

2. Bundle Size Comparison

ReMOAT (<5KB gzipped) vs LogRocket (138KB) vs FullStory (90KB). Keeping the script under 5KB ensures zero impact on mobile page load speeds.

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