v0.4.0 - Performance Improvements

PHP Async Extension v0.4.0

This release focuses on three core performance optimizations that significantly improve async operation efficiency.

Core Performance Improvements

1. Minimizing Kernel Function Calls

• Reduced unnecessary LibUV calls in scheduler tick processing
• Optimized network_async_accept_incoming - attempt accept() before waiting
• Separate queue for resumed coroutines to improve scheduler stability
• Replaced expensive EG(exception) checks with direct bool returns in TrueAsync API

2. Event Descriptor Caching

• Introduced zend_async_poll_proxy_t structure for efficient file descriptor management
• Event handler caching for sockets - avoid EventLoop recreation overhead
• Poll proxy event aggregation and improved lifecycle management
• Automatic waker event cleanup when coroutines resume (ZEND_ASYNC_WAKER_CLEAN_EVENTS)

3. Memory Allocation Optimization

• Fixed ref_count logic in zend_async_event_callback_t structures
• Optimized waker trigger structures with improved memory layout
• Enhanced memory allocation patterns for async structures
• Better resource cleanup and lifecycle management

Additional Features

• Full async UDP socket operations integrated with TrueAsync API
• Implemented SSL support for socket streams

Bug Fixes

• Fixed await iterator logic for awaitXXX functions
• Resolved process waiting logic issues on UNIX-like systems
• Fixed compilation errors in curl_async.c
• Improved iterator state management in concurrent environments

Requirements

• LibUV: >= 1.45.0 (upgraded from 1.44.0 to fix critical timer bugs)
• PHP: 8.5+
• Platforms: Linux, macOS, Windows, FreeBSD, etc.

API Changes

• TrueAsync API functions now return bool instead of void for better performance
• Automatic cleanup of waker events when coroutines resume

For detailed technical changes, see CHANGELOG.md.