What are the main application scenarios of WebAssembly?

WebAssembly has extensive application scenarios in actual projects, particularly suitable for tasks requiring high-performance computing:

1. Image and Video Processing

• Image filters and editing: Implement complex image processing algorithms using WebAssembly (blur, sharpen, color adjustment)
• Video encoding/decoding: FFmpeg.wasm enables video transcoding in browsers
• Computer vision: Face recognition, object detection, image segmentation
• Examples: Photoshop Web version, online video editors

2. Game Development

• Game engine porting: Port Unity, Unreal Engine and other game engines to Web
• Physics engines: Box2D, Cannon.js physics calculations
• 3D rendering: Combine with WebGL for high-performance 3D graphics
• Examples: Unity WebGL, Godot Engine Web version

3. Encryption and Security

• Encryption algorithms: AES, RSA, SHA encryption/decryption operations
• Hash calculation: Password hashing, file verification
• Blockchain: Cryptocurrency wallets, smart contract execution
• Examples: Cryptocurrency wallets, secure communication tools

4. Data Visualization

• Big data processing: Process and render large amounts of data points
• Scientific computing: Numerical simulation, statistical analysis
• Chart rendering: High-performance chart libraries (WebAssembly versions of Plotly, D3.js)
• Examples: Financial data analysis platforms, scientific visualization tools

5. Audio Processing

• Audio encoding/decoding: MP3, AAC, Opus audio format conversion
• Audio effects: Reverb, equalizer, noise reduction
• Speech recognition: Real-time speech-to-text
• Examples: Online audio editors, speech recognition applications

6. Scientific Computing

• Numerical computing: Matrix operations, linear algebra
• Simulation: Physical simulation, weather prediction
• Machine learning inference: TensorFlow.js, ONNX Runtime Web
• Examples: Scientific computing platforms, AI inference engines

7. Compression and Decompression

• File compression: ZIP, GZIP, 7z formats
• Data compression: LZ4, Zstd efficient compression algorithms
• Examples: Online compression tools, file transfer optimization

8. Performance Optimization Scenarios

• Compute-intensive tasks: Avoid blocking the main thread
• Real-time processing: Applications with strict latency requirements
• Offline computing: Reduce server load

Criteria for Choosing WebAssembly:

• Task is compute-intensive and JavaScript performance is insufficient
• Need to reuse existing C/C++/Rust codebases
• Strict requirements for performance and latency
• Need to run complex algorithms in browsers