About

This is not just a counter; it is a diagnostic engine for the web rendering pipeline. In high-performance applications - be it competitive gaming, algorithmic trading dashboards, or complex 3D visualizations - the average Frame Per Second (FPS) is a misleading metric. An average of 60 FPS can still conceal jarring micro-stutters where a single frame hangs for 100 milliseconds.

This utility exposes the raw truth of your hardware's capabilities. By analyzing the Frame Time (the precise duration required to render a single image), we calculate the 1% Lows and Jitter (Variance). These metrics are the industry standard for determining "smoothness." Furthermore, the integrated Stress Test pushes the GPU fill-rate and CPU draw-call limits to assign a standardized Performance Score, allowing you to benchmark your device against a database of known hardware profiles.

Formulas

To quantify stutter, we do not rely on simple averages. We utilize the 1% Low metric, which isolates the worst-performing frames in a dataset. If your Average FPS is 60 but your 1% Low is 15, you will experience noticeable lag.

FrameTime = t_current − t_previous1000

We also calculate Jitter (Standard Deviation of Frame Times) to measure consistency:

σ = √n∑i=1(x_i − x)²n − 1

Reference Data

Refresh Rate (Hz)	Frame Time Interval (ms)	Perceptual Smoothness	Hardware Requirement
24	41.67	Cinematic (Motion Blur needed)	Basic Embedded / Legacy
30	33.33	Minimum Viable Interactive	Low-End Mobile
60	16.67	Standard Fluidity	Modern Phones / Office PC
90	11.11	VR Baseline (Comfort)	Mid-Range Gaming / Flagship Phones
120	8.33	High Responsiveness	Performance GPU
144	6.94	Competitive Edge	High-End Gaming Rig
240	4.17	Imperceptible Latency	Enthusiast Tier
360	2.78	Biological Limit Approach	Experimental / Top 0.1%

Frequently Asked Questions

The 1% Low value represents the average frame rate of the worst 1% of frames during the test. For example, if you are playing a game at 100 FPS average, but the 1% Low is 20 FPS, the game will feel choppy because of sudden, brief slowdowns. A high 1% Low is the true mark of a powerful system.

The Score is a composite index calculated from three factors: your ability to maintain 60FPS under load, the maximum number of particles your GPU processed before performance degraded, and the stability (jitter) of your frame times. A score over 5000 is considered excellent for web usage.

This is usually due to V-Sync (Vertical Synchronization). Browsers synchronize their paint cycles with your monitor's refresh rate to save battery and prevent screen tearing. If your monitor is 60Hz, the browser will not exceed 60 FPS.

It tests both. The logic to calculate positions and physics runs on the CPU (JavaScript), while the rendering of the thousands of particles is offloaded to the GPU (Canvas API). The "Stress" toggle increases the particle count to find the bottleneck in this pipeline.