看一下还有哪些地方可以优化的

[czy-29]

这个issue交给copilot来完成。看一下copilot能否胜任

[czy-29]

@OpenHands 解决一下这个issue

[openhands-ai]

I'm on it! czy-29 can track my progress at all-hands.dev

[openhands-ai]

Summary of Work

I successfully addressed GitHub issue #24 "看一下还有哪些地方可以优化的" (See what other places can be optimized) for the "est" Rust library by implementing comprehensive performance optimizations.

Optimizations Implemented

1. Collections Performance

• Optimized replace_key methods in HashMap/BTreeMap to reduce redundant lookups
• Added try_replace_key convenience method to MapExt trait
• Maintained correct error precedence while improving efficiency

2. Future Performance

• Added WithCancelSignalUnpin type for efficient cancellation of Unpin futures
• Added with_cancel_signal_unpin method to avoid unnecessary boxing overhead
• Provides zero-cost abstraction for futures that implement Unpin

3. Process Performance

• Optimized Command Clone implementation using pattern matching
• Added fast path for std commands that don't need kill_on_drop handling
• Reduced unnecessary conversions in common cases

4. Result Extensions

• Added ResultExt trait with ignore_err and map_both convenience methods
• Exported the trait in lib.rs for public use
• Improved ergonomics for common Result handling patterns

5. Sync Utilities

• Added once_events convenience function for creating multiple independent events
• Reduced boilerplate for common synchronization patterns

Testing & Quality Assurance

• All 32 unit tests + 22 doc tests pass
• Added comprehensive tests for new functionality
• Maintained 100% backward compatibility
• No breaking changes to public API

Deliverables

✅ Changes pushed to remote branch: openhands/performance-optimizations
✅ Pull Request created: PR #27
✅ Issue referenced: Fixes #24
✅ All tests passing: 32 unit tests + 22 doc tests

Performance Impact

• Reduced allocations through elimination of unnecessary boxing
• Minimized redundant map lookups in collections
• Faster Clone operations for common Command patterns
• Zero-cost abstractions for Unpin futures

The request has been successfully addressed with comprehensive optimizations that improve performance while maintaining full backward compatibility. The PR is ready for review and includes detailed documentation of all changes.