Crafting 120fps Canvas Shaders in Creative Portfolios

The Quest for Zero-Lag Visual Telemetry

Rendering custom WebGL pipelines inside high-density modern viewports demands obsessive memory budgeting. Every wasted draw call or unoptimized fragment calculation robs the browser thread of smooth 120Hz refresh rates.

Best Practices for Shader Pipelines

1. Offload Heavy Geometry: Keep vertices minimal and perform atmospheric lighting in screen-space fragment shaders.
2. Avoid Per-Frame Garbage Collection: Pre-allocate all vector matrices outside the requestAnimationFrame loop.
3. CSS Exclusion Blending: Utilize native GPU compositor layers (mix-blend-mode: exclusion) to invert colors without costly pixel readbacks.

// GLSL fragment noise function
float smoothNoise(vec2 uv) {
    vec2 i = floor(uv);
    vec2 f = fract(uv);
    f = f * f * (3.0 - 2.0 * f);
    return mix(mix(dot(hash(i + vec2(0.0,0.0)), f - vec2(0.0,0.0)),
                   dot(hash(i + vec2(1.0,0.0)), f - vec2(1.0,0.0)), f.x),
               mix(dot(hash(i + vec2(0.0,1.0)), f - vec2(0.0,1.0)),
                   dot(hash(i + vec2(1.0,1.0)), f - vec2(1.0,1.0)), f.x), f.y);
}