Slow pages, render-blocking resources, and third-party bloat.

Performance Analysis

Page speed directly impacts rankings, conversions, and user experience. Google has confirmed that page speed is a ranking factor. But slow sites aren't always caused by the obvious culprits — render-blocking JavaScript and CSS, non-WOFF2 fonts, oversized scripts, and third-party tag bloat can be just as damaging as large images. EchoBat measures response times across your entire site and identifies the specific resources causing slowdowns.

How It Works

EchoBat measures the response time of every page during the crawl and collects resource metadata (type, size, domain, blocking status). The Performance lens computes percentile distributions, identifies statistical outliers (3x median), and categorizes slowdown causes: render-blocking JS/CSS, heavy fonts (non-WOFF2), large script bundles, and third-party resources. Issues are ranked by a composite score considering both severity and page traffic.

Proof Returned in the Report

Every Performance Analysis finding is tied to crawl evidence: affected URLs, the source signal, severity, score impact, and the next action exposed in the portal, CLI JSON, and MCP tools.

Sample Evidence Fields

  • Slow Pages: Pages with response times 3x the median or exceeding 2 seconds — the worst offenders.
  • Response Time Percentiles: P50, P90, and P99 response times across your site for statistical analysis.
  • Render-Blocking Resources: JavaScript and CSS files that block initial page rendering.

Why It Matters

  • Statistical analysis: P50/P90/P99 across your entire site
  • Find render-blocking resources slowing first paint
  • Identify third-party scripts adding hidden latency
  • Font optimization opportunities for faster text rendering

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