Site Speed Checker &
Payload Latency Auditor.
Audit server response latency (TTFB), asset compression (Gzip/Brotli), payload weight distribution, and DOM complexity that govern crawler efficiency and page delivery.
What This Analyzer Checks
Every check is evaluated by our deterministic engine according to Google standards and AI search requirements.
Time to First Byte (TTFB)
Measures network fetch latency from initial HTTP request to receiving the first byte of HTML.
Asset Compression (Gzip / Brotli)
Checks Content-Encoding headers for compression algorithms that reduce transfer payloads.
Payload Weight Distribution
Calculates byte transfer weights across HTML markup, scripts, stylesheets, and images.
Render-Blocking Asset Detection
Scans <head> for synchronous external scripts and unoptimized stylesheets delaying first render.
DOM Complexity & Node Count
Audits total DOM elements to prevent browser memory exhaustion and style recalculation lag.
Server Latency vs. Field Vitals
Differentiates deterministic server response diagnostics from real-user Chrome UX (CrUX) field metrics.
Why Server Response Speed and Payload Weight Govern Crawl Efficiency
Search engine crawlers and visitors both demand fast server responses. High TTFB latency and uncompressed assets cause crawler timeouts, deplete crawl budgets, and spike user bounce rates. Deterministically auditing your server latency and payload distribution ensures search bots index your pages rapidly.
How WebDarpan Analyzes Your Site
TTFB Response Profiler
Measures server network roundtrip time and HTML response latency.
Asset Payload Breakdown
Quantifies exact byte sizes for scripts, stylesheets, images, and HTML.
Compression Validator
Inspects HTTP Content-Encoding headers for Brotli and Gzip enablement.
Render Blocker Audit
Identifies synchronous assets blocking initial DOM parsing.
Common Issues Discovered by This Analyzer
Illustrative examples of issues detected during deterministic audit analysis.
Initial server response latency is 940ms, delaying crawl execution and page display.
HTML/CSS/JS resources lack Gzip or Brotli compression, inflating transfer payloads.
Synchronous external scripts in document head block DOM tree construction.
Overly complex DOM tree increases browser memory usage and slows style recalculations.
What You Receive in the Full Report
Frequently Asked Questions About This Checker
What is Time to First Byte (TTFB) and why does it matter for SEO?
Time to First Byte measures the latency between client request and the initial byte returned by the web server. Fast TTFB (below 300ms) optimizes search crawler crawl budgets and accelerates perceived user loading speed.
How does Brotli compression improve site performance compared to Gzip?
Brotli offers 15–25% higher compression ratios on text resources (HTML, CSS, JavaScript) than standard Gzip, reducing network bandwidth payloads and cutting mobile page render delays.
What is the difference between lab test audits and real-user Core Web Vitals?
Lab audits measure performance under simulated, deterministic conditions. Real-user Core Web Vitals (CrUX) represent aggregated field performance (LCP, INP, CLS) collected over 28-day periods from Chrome users.