Learn FASTLY-COMPUTE-EDGE with Real Code Examples
Updated Nov 25, 2025
Performance Notes
Execution is near-instant due to global edge deployment
Reduces origin server latency and load
Optimized for short-lived, high-frequency requests
Memory and CPU constraints limit long-running computations
Global scaling is automatic and instant
Security Notes
Functions run in isolated WebAssembly sandbox
Use HTTPS for secure client communication
Validate all input and sanitize headers
Access control via Fastly service configurations
Monitor edge logs for anomalous activity
Monitoring Analytics
Use Fastly logging for request/response events
Monitor cache hit/miss ratios
Set alerts for edge errors or latency spikes
Analyze traffic patterns globally
Inspect edge metrics for performance tuning
Code Quality
Write idempotent edge functions
Optimize for memory and execution time
Test locally and with staging deployment
Use logging for debugging and observability
Monitor cache behavior and TTL efficiency