sync.Pool is one of those tools that seems simple until you hit the edge cases. I've been using it heavily in a high-throughput service and wanted to share some patterns that actually work in production:
• Object reuse strategies that don't cause memory bloat
• Pool sizing considerations for different workloads
• Common pitfalls with pointer vs value types
• Integration with context and request lifecycle
The key insight: sync.Pool isn't just about performance - it's about predictable memory behavior under load.