1. Sub-10ms Latency (Ping Engine)

Standard HTTP fetches include DNS resolution, TCP handshakes, and browser HTTP stack setup overhead, artificially inflating ping to 15-25ms. Velocity uses a warmed XHR connection and measures Time-To-First-Byte (TTFB) deltas with microsecond precision (`performance.now()`), isolating true network round-trip latency (<10ms).

2. TCP Slow-Start Warmup Filter (Download Engine)

When starting a download stream, TCP algorithms gradually ramp up window size (slow start), which skews naive speed calculations. Velocity runs 6 parallel Web Worker streams and discards the first 1.5 seconds of warmup buffer before computing the top 80th-percentile sustained throughput.

3. High-Performance Multi-Threaded Blob Workers (Upload Engine)

To avoid freezing the main UI thread during heavy Gigabit upload bursts, Velocity instantiates inline Blob Web Workers (`URL.createObjectURL`). These background threads generate random entropy byte chunks in memory and upload via chunked `XMLHttpRequest` progress streams.

🔥 Mozilla Firefox Instructions

Firefox intentionally disabled native PWA address-bar install popups on desktop. However, you can add Velocity as a desktop app in 2 seconds:

Method 1 (Instant Drag & Drop): Click and hold the Lock / Page icon on the far left of the Firefox address bar (next to file:///...) and drag it directly onto your Windows Desktop! Firefox creates a desktop shortcut with the Velocity logo.

Method 2 (PWAs For Firefox Extension): Install the free extension PWAs for Firefox to run any site in a borderless app window.

🌐 Google Chrome / Microsoft Edge (Full PWA Window)

1. Open index.html in Chrome or Edge.

2. Click the 3 dots menu top-right ➔ Save and Share ➔ Create Shortcut...

3. Check the box "Open as window" and click Create!

4. Velocity will open in its own clean borderless app window and add a shortcut to your Start Menu and Taskbar.

1. Zero Installation & No Local Port Server

Desktop speedtests (like Ookla Speedtest for Windows) install an executable binary and host a local HTTP server on `127.0.0.1`. This regularly triggers Windows SmartScreen, App Control, and Firewall security warnings. Velocity runs 100% inside your browser sandbox with zero local server processes.

2. Strict Browser Sandbox Execution

Because Velocity uses standard browser APIs (Parallel XHR & Web Workers), it operates under browser sandbox isolation. It cannot touch your system files, read private local data, or execute unauthorized code.

3. 100% Privacy & Zero Telemetry Tracking

No tracking cookies, no personal telemetry collection, and no user profiling. All performance calculations happen locally in your browser memory.

Privacy Policy Statement

Velocity does not harvest, store, or sell personal user data, IP addresses, or browser footprints. Speed measurements are calculated strictly on your client device in temporary memory.

Open Technology

Built using standard HTML5, CSS3, and ES6 JavaScript with HTML5 Web Workers and Parallel XMLHttpRequest APIs.