Learn CHEERPJ with Real Code Examples

Wasm speeds computations but UI rendering may be slower

Heavy Swing/AWT apps load slower initially

Use resource compression for faster startup

Avoid excessive disk I/O calls

Prefer precompiled assets over dynamic loading when possible

Runs fully in browser sandbox

Avoid embedding sensitive credentials

Use HTTPS for resource loading

Check Java serialization boundaries

Beware of user-uploaded JAR files

Console logs for CJRE

Performance snapshots

Network panel for JAR loading

Memory profiling for CJRE heap

User analytics via JS integrations

Refactor heavy loops for Wasm efficiency

Reduce unnecessary UI repaint cycles

Keep JAR dependencies minimal

Avoid blocking operations in UI thread

Cache resources aggressively