v2.0.0 - Major Performance Overhaul

Release v2.0.0

🚀 Major Performance Overhaul

This release represents a complete performance rewrite leveraging Go 1.23+ features to achieve unprecedented speed and true zero allocations.

⚡ Performance Highlights

• 2x faster than v1.x - Reduced from ~40 ns/op to 21.88 ns/op
• True zero allocations - Direct writer operations now have 0 B/op
• 45.7 million logs/second - Industry-leading throughput
• Removed 64MB upfront allocation - More memory efficient

🔄 Breaking Changes

• Removed redundant logger implementations:
  • NanoLogger - Use UltimateLogger instead
  • SimpleLogger - Use Logger instead
  • ZeroAllocLogger - Use UltimateLogger instead
• Changed internal buffer pool implementation
• Minimum Go version is now 1.23

✨ New Features

Generic Buffer Pool

• Type-safe buffer management with zero interface{} boxing
• Tiered allocation strategy (64B to 1MB+)
• Automatic size class detection

Zero-Copy String Operations

• StringToBytes() - Convert strings without allocation
• BytesToString() - Convert bytes without allocation
• Uses unsafe.StringData from Go 1.20+

Lock-Free Async Writer

• Generic ring buffer with atomic.Pointer[T]
• Multiple worker goroutines for parallel writes
• Reduced allocations from 542 B/op to 262 B/op

Windows Color Support

• Automatic ANSI color detection for Windows 10+
• Virtual terminal processing enablement
• NO_COLOR environment variable support
• Manual color control via SetColorEnabled()

🐛 Bug Fixes

• Fixed terminal writer magic header mismatch
• Fixed buffer allocation issues for large messages
• Fixed string escaping performance with loop unrolling
• Fixed Windows terminal color escape sequences

📊 Benchmark Improvements

BenchmarkUltimateLogger-10       56M    21.88 ns/op    0 B/op    0 allocs/op
BenchmarkAsyncWriterDirect-10     8M   158.0 ns/op    0 B/op    0 allocs/op
BenchmarkZeroCopyString-10     2000M    0.497 ns/op    0 B/op    0 allocs/op

🔧 Migration Guide

For NanoLogger users:

// Old
logger := zlog.NewNanoLogger()

// New
logger := zlog.NewUltimateLogger()

For Windows users seeing escape codes:

// Option 1: Disable colors
tw := zlog.NewTerminalWriter(os.Stdout).(*zlog.TerminalWriter)
tw.SetColorEnabled(false)
logger.SetWriter(tw)

// Option 2: Use plain writer
logger.SetWriter(zlog.StdoutWriter())

// Option 3: Set environment variable
// SET NO_COLOR=1

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Full changelog: v1.2.5...v2.0.0