v0.6.0

Highlights

This release focuses on performance optimization and concurrency safety improvements, significantly enhancing throughput and stability under high-load scenarios.

⚠️ Breaking Changes

• Removed manual GC tuning configuration in main.go, replaced with automatic tuning mode

✨ New Features

Connection Pool Optimization

• Implemented connection pool preheating to eliminate cold start delay
• Optimized pool scaling logic with burst load batch expansion support
• Concurrent data session creation to accelerate scaling
• Added ping loop keep-alive mechanism for each session
• Introduced GetSessionStats method for detailed session statistics

Tunnel Management & Security

• Implemented IP-based tunnel count and registration rate limits
• Added rate limiter to prevent malicious registration behavior
• Client IP address tracking for access control

Concurrency Safety Enhancement

• CAS loop implementation for atomic operations on global tunnel counter
• Added rollback mechanism to ensure proper resource release on registration failure
• Combined atomic operations with locks for thread-safe IP rate limiting

⚡ Performance Improvements

Core Performance

• Optimized session selection using min-heap, reducing time complexity from O(n) to O(log n)
• Added bufio.Reader pool and buffer pool to reduce memory allocation
• Implemented sharded lock manager for improved high-concurrency performance
• Updated yamux with unified optimized configuration for better throughput
• Added patterned GC tuning

HTTP Server

• Used sync.Pool to reuse bufio.Writer, reducing GC pressure
• Enabled TCP_NODELAY for improved response speed
• Adjusted HTTP server timeout configuration to balance performance and security

Resource Management

• Optimized stream open timeout control using context to prevent goroutine leaks
• Improved shutdown process to ensure proper cleanup coroutine exit
• Reduced maximum frame size from 10MB to 1MB to mitigate DoS risk
• Used stack arrays instead of heap allocation for frame header reading

🔧 Other Changes

• ID generator now exclusively uses crypto/rand, removed timestamp fallback
• Added TryGenerateID for non-panic error handling
• Upgraded test scripts from Python to Go implementation
• Added nginx WebSocket proxy header configuration documentation

Upgrade Guide

This release primarily contains performance optimizations. When upgrading:

1. Remove any custom GC configuration code if present
2. Thoroughly test in high-load environments before production deployment

Full Changelog: v0.5.3...v0.6.0

What's Changed

• Perf/pool scaling and latency fix by @Gouryella in #12

Full Changelog: v0.5.3...v0.6.0