LEARNING OBJECTIVES ⌵
- Configure
ws.binaryType = 'arraybuffer'or'blob'for high-throughput binary streaming. - Render incoming JPEG/PNG/WebP binary chunks onto an HTML5
<canvas>element at 60 FPS. - Process raw pixel arrays (
ImageData) via TypedArrays (Uint8ClampedArray). - Prevent memory leaks by recycling buffer allocations.
🎬 INTERACTIVE VISUAL PIPELINE
Core Architecture Simulation
1. Input
Directives & Tags
2. Parse
Tokenizer & AST
3. Layout
Box Model & Flow
4. Render
GPU Paint & Composite
PHASE 1: INPUT & DIRECTIVES
Browser receives declarative markup stream, parsing tag tokens and initializing component state.
📖 The Mental Model & Story
Streaming text over WebSockets requires the browser to parse strings, allocate garbage-collected memory, and decode Unicode characters.
When streaming live video frames, audio waveforms, or remote desktop screens, sending raw binary byte arrays (ArrayBuffer) bypasses all text encoding overhead. The incoming byte payload is piped directly into the GPU rasterizer or Canvas pixel buffer via zero-copy memory transfers.
Incoming WebSocket Binary Frame
|
v
[Uint8Array Image Buffer] ===> createImageBitmap() ===> ctx.drawImage() (GPU Render)
💻 Interactive Code Playground
📌 Key Takeaways
- Always set
ws.binaryType = 'arraybuffer'for deterministic memory performance. - Use
createImageBitmap(blob)instead of creating object URLs to avoid garbage collection pauses. - Call
bitmap.close()immediately after drawing to prevent GPU texture memory leaks. - --
❓ Knowledge Check
1. Which of the following is correct?
2. Which of the following is correct?