SwiftFTR v0.5.2

Performance Improvements

Parallel Ping Execution (6.4x speedup)

• FIXED: ping() now runs in parallel, not serially
• Changed ping() from actor-isolated to nonisolated method
• Changed internal PingExecutor from actor to struct
• Multiple concurrent ping() calls now execute truly in parallel

Benchmark Results

• Before: 20 concurrent pings would take ~7.2s (serialized)
• After: 20 concurrent pings take ~1.1s (parallel, 7ms spread)
• Speedup: 6.4x

Test Results

• 18/20 pings to Tanzania: 361-362ms RTT (1.3ms variance)
• Completion spread: 7ms (proves true parallelism)
• Added PingParallelismTests with high-RTT target validation

Technical Details

• PingExecutor converted to struct (no mutable state, doesn't need actor isolation)
• Each ping operation creates its own socket for true independence
• ResponseCollector remains actor for thread-safe response handling
• No breaking changes to public API

Testing

• All 45 tests passing
• New parallelism test validates concurrent execution with <500ms spread