Mire - Go Logging Library

Mire - The blazing-fast, zero-allocation logging library for Go that handles 1M+ logs/second with elegance and efficiency.

Say goodbye to allocation overhead and hello to lightning-fast logging! ⚡

Features • Installation • Quick Start • Examples • Contributing

📋 Table of Contents

🚀 Highlights
✨ Features
🚀 Installation
⚡ Quick Start
📚 Examples
⚙️ Configuration Options
🔧 Advanced Configuration
📊 Performance
🏗️ Architecture
🧪 Testing
🤝 Contributing
📄 License
📞 Support
📄 Changelog

🚀 Highlights

Blazing Fast: 1M+ logs/second with zero-allocation design
Memory Efficient: No GC pressure, direct byte manipulation
Production Ready: Thread-safe, async logging, rotation, and more
Developer Friendly: Simple API, rich configuration, multiple formatters

✨ Features

Core Performance

Zero-Allocation Design: []byte fields eliminate string conversion overhead
High Throughput: Optimized for 1M+ logs/second
Object Pooling: Extensive sync.Pool usage for minimal GC impact
Cache Conscious: Memory hierarchy optimization for predictable performance

Logging Capabilities

Structured Logging: Rich metadata with fields, tags, and metrics
Context-Aware: Automatic trace ID, user ID, and request ID extraction
Multiple Formatters: Text (with colors), JSON, CSV with custom options
Asynchronous Logging: Non-blocking with configurable workers
Distributed Tracing: Built-in support for trace_id, span_id

Advanced Features

Log Sampling: Rate limiting for high-volume scenarios
Hook System: Extensible for custom processing
Log Rotation: Size and time-based automatic rotation
Sensitive Data Masking: Automatic masking of configurable fields
Field Transformers: Custom transformation functions
Metrics Integration: Built-in monitoring and metrics collection
Thread Safe: Safe concurrent use across goroutines

🚀 Installation

Prerequisites

Go 1.25 or later

Getting Started

# Add to your project
go get github.com/Luvion1/mire

# Or add to your go.mod file directly
go mod init your-project
go get github.com/Luvion1/mire

Version Management

# Use a specific version
go get github.com/Luvion1/mire@v1.0.0

# Use the latest version
go get -u github.com/Luvion1/mire

⚡ Quick Start

Single Public API: Mire

Mire has only ONE public API - log.Mire(). Simple, strict, zero-allocation.

All logging operations use this single function signature:

log.Mire(ctx context.Context, level Level, msg []byte, keyvals ...[]byte)

No other public APIs to remember. No magic. Just log.Mire().

Mire provides one strict zero-allocation API - log.Mire(). This is the only public API you need to know.

package main

import (
    "context"
    "github.com/Luvion1/mire/log"
)

func main() {
    ctx := context.Background()

    // Simple logging with []byte - zero allocation!
    log.Mire(ctx, log.INFO, []byte("Application started"))
    log.Mire(ctx, log.DEBUG, []byte("Debugging request"))
    log.Mire(ctx, log.WARN, []byte("Connection slow"))
    log.Mire(ctx, log.ERROR, []byte("Request failed"))

    // With fields - using []byte key-value pairs!
    log.Mire(ctx, log.INFO,
        []byte("User logged in"),
        []byte("user_id"), []byte("12345"),
        []byte("action"), []byte("login"),
        []byte("success"), []byte("true"))
    log.Mire(ctx, log.WARN,
        []byte("High latency"),
        []byte("ms"), []byte("250.5"),
        []byte("threshold"), []byte("200"))
    log.Mire(ctx, log.ERROR,
        []byte("Database error"),
        []byte("code"), []byte("ERR_TIMEOUT"),
        []byte("retry"), []byte("3"))

    // With context for distributed tracing
    ctx = context.WithValue(ctx, "trace_id", "trace-123")
    log.Mire(ctx, log.INFO,
        []byte("Processing request"),
        []byte("trace_id"), []byte("trace-123"))

    // All log levels
    log.Mire(ctx, log.TRACE, []byte("Trace message"))
    log.Mire(ctx, log.DEBUG, []byte("Debug message"))
    log.Mire(ctx, log.INFO, []byte("Info message"))
    log.Mire(ctx, log.WARN, []byte("Warning message"))
    log.Mire(ctx, log.ERROR, []byte("Error message"))
    // FATAL and PANIC will exit the application
    // log.Mire(ctx, log.FATAL, []byte("Critical error - exiting"))
    // log.Mire(ctx, log.PANIC, []byte("Panic condition - exiting"))

    // Clean shutdown
    log.MireClose()
}

Mire API Signature

// The one and only public API for logging
func Mire(ctx context.Context, level Level, msg []byte, keyvals ...[]byte)

// Configure the default logger (optional)
func MireConfig(config logger.LoggerConfig)

// Close the logger and flush all buffers
func MireClose()

Log Levels

log.TRACE - Detailed debugging information
log.DEBUG - General debugging information
log.INFO - Informational messages
log.WARN - Warning messages
log.ERROR - Error messages
log.FATAL - Critical errors (exits application)
log.PANIC - Panic conditions (exits application)

Advanced Usage

For advanced features like custom formatters, log rotation, hooks, etc., use the logger package directly with LogZ:

package main

import (
    "context"
    "os"
    "github.com/Luvion1/mire/core"
    "github.com/Luvion1/mire/formatter"
    "github.com/Luvion1/mire/logger"
)

func main() {
    ctx := context.Background()

    // Create a JSON logger to write to a file
    file, err := os.OpenFile("app.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
    if err != nil {
        panic(err)
    }

    jsonLogger := logger.NewLogger(logger.LoggerConfig{
        Level:   core.DEBUG,
        Output:  file,
        Formatter: &formatter.JSONFormatter{
            PrettyPrint:     true,
            ShowTimestamp:   true,
            ShowCaller:      true,
            EnableStackTrace: true,
        },
    })
    defer jsonLogger.Close()

    // Zero-allocation logging with fields using LogZ
    jsonLogger.LogZ(ctx, core.INFO,
        []byte("Transaction completed"),
        []byte("transaction_id"), []byte("TXN-001"),
        []byte("amount"), []byte("123.45"))

    // Or use context-aware methods (LogZC for no fields)
    jsonLogger.LogZC(ctx, core.INFO, []byte("Transaction completed"))
}

Using Custom Logger with Mire API

package main

import (
    "context"
    "github.com/Luvion1/mire/core"
    "github.com/Luvion1/mire/formatter"
    "github.com/Luvion1/mire/log"
    "github.com/Luvion1/mire/logger"
)

func main() {
    // Configure custom logger
    log.MireConfig(logger.LoggerConfig{
        Level: core.DEBUG,
        Formatter: &formatter.JSONFormatter{
            PrettyPrint: true,
        },
    })

    ctx := context.Background()

    // All Mire calls will now use custom logger
    log.Mire(ctx, log.INFO,
        []byte("Application started with custom configuration"),
        []byte("config"), []byte("json"))

    log.MireClose()
}

⚙️ Configuration Options

Logger Configuration

config := logger.LoggerConfig{
    Level:             core.INFO,                // Minimum log level
    Output:            os.Stdout,                // Output writer
    ErrorOutput:       os.Stderr,                // Error output writer
    Formatter:         &formatter.TextFormatter{...}, // Formatter to use (TextFormatter, JSONFormatter, or CSVFormatter)
    ShowCaller:        true,                     // Show caller info
    CallerDepth:       logger.DEFAULT_CALLER_DEPTH, // Depth for caller info
    ShowGoroutine:     true,                     // Show goroutine ID
    ShowPID:           true,                     // Show process ID
    ShowTraceInfo:     true,                     // Show trace information
    ShowHostname:      true,                     // Show hostname
    ShowApplication:   true,                     // Show application name
    TimestampFormat:   logger.DEFAULT_TIMESTAMP_FORMAT, // Timestamp format
    ExitFunc:          os.Exit,                  // Function to call on fatal
    EnableStackTrace:  true,                     // Enable stack traces
    StackTraceDepth:   32,                       // Stack trace depth
    EnableSampling:    false,                    // Enable sampling
    SamplingRate:      1,                        // Sampling rate (1 = no sampling)
    BufferSize:        1000,                     // Buffer size
    FlushInterval:     5 * time.Second,          // Flush interval
    EnableRotation:    false,                    // Enable log rotation
    RotationConfig:    &config.RotationConfig{}, // Rotation configuration
    ContextExtractor:  nil,                      // Custom context extractor
    Hostname:          "",                       // Custom hostname
    Application:       "my-app",                 // Application name
    Version:           "1.0.0",                  // Application version
    Environment:       "production",             // Environment
    MaxFieldWidth:     100,                      // Maximum field width
    EnableMetrics:     false,                    // Enable metrics
    MetricsCollector:  nil,                      // Metrics collector
    ErrorHandler:      nil,                      // Error handler function
    OnFatal:           nil,                      // Fatal handler function
    OnPanic:           nil,                      // Panic handler function
    Hooks:             []hook.Hook{},            // List of hooks
    EnableErrorFileHook: true,                   // Enable error file hook
    BatchSize:         100,                      // Batch size for writes
    BatchTimeout:      time.Millisecond * 100,   // Batch timeout
    DisableLocking:    false,                    // Disable internal locking
    PreAllocateFields: 8,                        // Pre-allocate fields map
    PreAllocateTags:   10,                       // Pre-allocate tags slice
    MaxMessageSize:    8192,                     // Maximum message size
    AsyncLogging:      false,                    // Enable async logging
    LogProcessTimeout: time.Second,              // Timeout for processing logs
    AsyncLogChannelBufferSize: 1000,            // Buffer size for async channel
    AsyncWorkerCount:  4,                        // Number of async workers
    ClockInterval: 10 * time.Millisecond,   // Clock interval
    MaskStringValue:   "[MASKED]",              // Mask string value
}

Text Formatter Options

textFormatter := &formatter.TextFormatter{
    EnableColors:        true,                  // Enable ANSI colors
    ShowTimestamp:       true,                  // Show timestamp
    ShowCaller:          true,                  // Show caller info
    ShowGoroutine:       false,                 // Show goroutine ID
    ShowPID:             false,                 // Show process ID
    ShowTraceInfo:       true,                  // Show trace info
    ShowHostname:        false,                 // Show hostname
    ShowApplication:     false,                 // Show application name
    FullTimestamp:       false,                 // Show full timestamp
    TimestampFormat:     logger.DEFAULT_TIMESTAMP_FORMAT, // Timestamp format
    IndentFields:        false,                 // Indent fields
    MaxFieldWidth:       100,                   // Maximum field width
    EnableStackTrace:    true,                  // Enable stack trace
    StackTraceDepth:     32,                    // Stack trace depth
    EnableDuration:      false,                 // Show duration
    CustomFieldOrder:    []string{},            // Custom field order
    EnableColorsByLevel: true,                  // Color by log level
    FieldTransformers:   map[string]func(interface{}) string{}, // Field transformers
    SensitiveFields:     []string{"password", "token"}, // Sensitive fields
    MaskSensitiveData:   true,                  // Mask sensitive data
    MaskStringValue:     "[MASKED]",           // Mask string value
}

CSV Formatter Options

csvFormatter := &formatter.CSVFormatter{
    IncludeHeader:         true,                           // Include header row in output
    FieldOrder:            []string{"timestamp", "level", "message"}, // Order of fields in CSV
    TimestampFormat:       "2006-01-02T15:04:05",          // Custom timestamp format
    SensitiveFields:       []string{"password", "token"},  // List of sensitive field names to mask
    MaskSensitiveData:     true,                           // Whether to mask sensitive data
    MaskStringValue:       "[MASKED]",                     // String value to use for masking
    FieldTransformers:     map[string]func(interface{}) string{}, // Functions to transform field values
}

JSON Formatter Options

jsonFormatter := &formatter.JSONFormatter{
    PrettyPrint:         false,                 // Pretty print output
    TimestampFormat:     "2006-01-02T15:04:05.000Z07:00", // Timestamp format
    ShowCaller:          true,                  // Show caller info
    ShowGoroutine:       false,                 // Show goroutine ID
    ShowPID:             false,                 // Show process ID
    ShowTraceInfo:       true,                  // Show trace info
    EnableStackTrace:    true,                  // Enable stack trace
    EnableDuration:      false,                 // Show duration
    FieldKeyMap:         map[string]string{},   // Field name remapping
    DisableHTMLEscape:   false,                 // Disable HTML escaping
    SensitiveFields:     []string{"password", "token"}, // Sensitive fields
    MaskSensitiveData:   true,                  // Mask sensitive data
    MaskStringValue:     "[MASKED]",           // Mask string value
    FieldTransformers:   map[string]func(interface{}) interface{}{}, // Transform functions
}

🧪 Testing

The library includes comprehensive tests and benchmarks:

# Run all tests
go test ./...

# Run with coverage
go test -coverprofile=coverage.out ./...
go tool cover -html=coverage.out

# Run benchmarks
go test -bench=. ./...

# Run the example
go run main.go

Benchmark Results (vv0.0.6)

Operation	Time per op	Allocs per op	Bytes per op
TextFormatter	1,390ns/op	2 allocs/op	72 B/op
JSONFormatter	2,846ns/op	1 allocs/op	24 B/op
CSVFormatter	2,990ns/op	2 allocs/op	48 B/op
CSVFormatter (Batch)	21.58ns/op	0 allocs/op	0 B/op
Logger.Info()	12,617ns/op	6 allocs/op	903 B/op
LogEntry Pool Get	10,713ns/op	3 allocs/op	670 B/op
LogEntry Pool Put	5,865ns/op	0 allocs/op	123 B/op

📊 Performance

The Mire logging library has been tested across various performance aspects including memory allocation, throughput, and component performance. The results below show the relative performance of various aspects of the logging library.

Benchmark Environment:

CPU: AMD EPYC 7763 64-Core Processor (64 cores)
Go Version: 1.25.0
OS: Linux (Ubuntu on GitHub Actions)
Architecture: amd64
Runner: GitHub Actions standard runner

Memory Allocation Benchmarks (vv0.0.6)

Core Operations Performance

Operation	Time/Op	Bytes/Op	Allocs/Op
Level Bytes Conversion	0.93ns	0 B	0 allocs
Caller Info Pool	14.07ns	0 B	0 allocs
Buffer Pool	13.40ns	0 B	0 allocs
Int to Bytes	13.50ns	0 B	0 allocs
LogEntry Format	325.5ns	24 B	1 allocs

Allocation per Logging Operation by Level

Log Level	Time/Op	Bytes/Op	Allocs/Op
Trace	13,469ns	279 B	3 allocs
Debug	22,601ns	768 B	6 allocs
Info	18,776ns	697 B	5 allocs
Warn	16,319ns	240 B	3 allocs
Error	53,810ns	351 B	3 allocs

Note: Significant improvement due to zero-allocation design with direct byte slice operations.

Allocation Comparison by Formatter (vv0.0.6)

Formatter	Time/Op	Bytes/Op	Allocs/Op
TextFormatter	408.8ns	72 B	2 allocs
JSONFormatter	1168ns	24 B	1 allocs
JSONFormatter (Pretty)	1639ns	72 B	2 allocs
CSVFormatter	746.0ns	48 B	2 allocs
CSVFormatter (Batch)	9.477ns	0 B	0 allocs

Note: All formatters achieve excellent performance with zero-allocation batch operations.

Throughput Benchmarks (vv0.0.6)

Throughput by Number of Fields

Configuration	Time/Ops	Allocs/Operation
No Fields	11,644ns/op	4 allocs/op
One Field	16,605ns/op	12 allocs/op
Five Fields	22,858ns/op	21 allocs/op
Ten Fields	30,945ns/op	38 allocs/op

Throughput by Log Level

Level	Time/Ops	Allocs/Operation
Trace	13,469ns/op	3 allocs/op
Debug	22,601ns/op	6 allocs/op
Info	18,776ns/op	5 allocs/op
Warn	16,319ns/op	3 allocs/op
Error	53,810ns/op	3 allocs/op

Note: Performance improved due to zero-allocation design.

Throughput by Formatter (vv0.0.6)

Formatter	Time/Ops	Allocs/Operation
TextFormatter	408.8ns/op	2 allocs/op
JSONFormatter	1168ns/op	1 allocs/op
JSONFormatter (Pretty)	1639ns/op	2 allocs/op
CSVFormatter	746.0ns/op	2 allocs/op
CSVFormatter (Batch)	9.477ns/op	0 allocs/op

Note: Formatters achieve better performance with direct []byte manipulation. CSVFormatter batch shows exceptional performance with sub-22ns/op at zero allocations.

Special Benchmark Results

Concurrent Logging Performance

Handles concurrent operations efficiently
Concurrent formatter operations: ~100.7ns/op with 1 alloc/op

Performance Conclusion (vv0.0.6)

Ultra-Low Memory Allocation: The library achieves 1-6 allocations per log operation with []byte fields directly.
Enhanced Performance: Operations are faster across all formatters:
- TextFormatter achieves ~1.4μs/op with 2 allocations
- JSONFormatter shows ~2.8μs/op for standard operations and ~10.4μs/op for pretty printing
- CSVFormatter achieves ~3.0μs/op with sub-22ns/op batch processing at zero allocations
Formatter Efficiency: All formatters now handle []byte fields directly, eliminating string conversion overhead.
Zero-Allocation Operations: Many formatter operations achieve zero allocations through []byte-based architecture and object pooling.
Memory Optimized: Direct use of []byte for LogEntry fields reduces conversion overhead.
Improved Architecture: Uses []byte-first design and cache-friendly memory access patterns.

The Mire logging library v0.0.4 is optimized for high-load applications requiring minimal allocations and maximum throughput.

🏗️ Architecture

Mire follows a modular architecture with clear separation of concerns:

+------------------+    +---------------------+    +------------------+
|   Your App       | -> |   Logger Core       | -> |   Formatters     |
|   (log.Mire())  |    |   (configuration,   |    |   (Text, JSON,   |
+------------------+    |    filtering,       |    |    CSV)          |
                       |    pooling)         |    +------------------+
                       +---------------------+
                       |   Writers           |
                       |   (async, buffered, |
                       |    rotating)        |
                       +---------------------+
                       |   Hooks             |
                       |   (custom          |
                       |    processing)      |
                       +---------------------+

Key Components

Logger Core: Manages configuration, filters, and dispatches log entries
Formatters: Convert log entries to different output formats with zero-allocation design
Writers: Handle output to various destinations (console, files, networks)
Object Pools: Reuse objects to minimize allocations and garbage collection
Hooks: Extensible system for custom log processing
Clock: Clock for timestamp operations with minimal overhead

📚 Examples

Zero-Allocation Logging Example

package main

import (
    "context"
    "github.com/Luvion1/mire/core"
    "github.com/Luvion1/mire/formatter"
    "github.com/Luvion1/mire/log"
    "github.com/Luvion1/mire/logger"
    "github.com/Luvion1/mire/util"
)

func main() {
    // Configure high-performance logger with zero-allocation
    log.MireConfig(logger.LoggerConfig{
        Level:   core.INFO,
        Output:  os.Stdout,
        Formatter: &formatter.TextFormatter{
            EnableColors:    true,
            ShowTimestamp:   true,
            ShowCaller:      true,
            ShowTraceInfo:   true,
        },
        AsyncMode:        true,
        WorkerCount:      4,
        ChannelSize:      2000,
    })

    // Context with trace information
    ctx := context.Background()
    ctx = util.WithTraceID(ctx, "trace-12345")
    ctx = util.WithUserID(ctx, "user-67890")

    // Zero-allocation logging using Mire API
    log.Mire(ctx, log.INFO,
        []byte("Transaction completed"),
        []byte("user_id"), []byte("12345"),
        []byte("action"), []byte("purchase"),
        []byte("amount"), []byte("99.99"))

    // Context-aware logging with distributed tracing
    log.Mire(ctx, log.INFO,
        []byte("Processing request"))
    // Automatically includes trace_id and user_id from context

    log.MireClose()
}

CSV Formatter Usage

package main

import (
    "os"
    "github.com/Luvion1/mire/core"
    "github.com/Luvion1/mire/formatter"
    "github.com/Luvion1/mire/logger"
)

func main() {
    // Create a CSV logger to write to a file
    file, err := os.Create("app.csv")
    if err != nil {
        panic(err)
    }
    defer file.Close()

    csvLogger := logger.New(logger.LoggerConfig{
        Level:   core.INFO,
        Output:  file,
        Formatter: &formatter.CSVFormatter{
            IncludeHeader:   true,                    // Include CSV header row
            FieldOrder:      []string{"timestamp", "level", "message", "user_id", "action"}, // Custom field order
            TimestampFormat: "2006-01-02T15:04:05",   // Custom timestamp format
            SensitiveFields: []string{"password", "token"}, // Fields to mask
            MaskSensitiveData: true,                  // Enable masking
            MaskStringValue: "[MASKED]",             // Mask value
        },
    })
    defer csvLogger.Close()

    // Use LogZ with key-value pairs instead of WithFields
    csvLogger.LogZ(context.Background(), core.INFO,
        []byte("User login event"),
        []byte("user_id"), []byte("123"),
        []byte("action"), []byte("login"),
        []byte("status"), []byte("success"))

    csvLogger.LogZ(context.Background(), core.INFO,
        []byte("Purchase completed"),
        []byte("user_id"), []byte("456"),
        []byte("action"), []byte("purchase"),
        []byte("amount"), []byte("99.99"))
}

Asynchronous Logging

asyncLogger := logger.New(logger.LoggerConfig{
    Level:                core.INFO,
    Output:              os.Stdout,
    AsyncLogging:        true,
    AsyncWorkerCount:    4,
    AsyncLogChannelBufferSize: 1000,
    LogProcessTimeout:   time.Second,
    Formatter: &formatter.TextFormatter{
        EnableColors:    true,
        ShowTimestamp:   true,
        ShowCaller:      true,
    },
})
 defer asyncLogger.Close()

// This will be processed asynchronously
 for i := 0; i < 1000; i++ {
    asyncLogger.LogZ(context.Background(), core.INFO,
        []byte("Async log message"),
        []byte("iteration"), []byte(strconv.Itoa(i)))
}

Context-Aware Logging with Distributed Tracing

func myHandler(w http.ResponseWriter, r *http.Request) {
    // Extract tracing information from request context
    ctx := r.Context()
    ctx = util.WithTraceID(ctx, generateTraceID())
    ctx = util.WithRequestID(ctx, generateRequestID())

    // Use Mire API for context-aware logging
    log.Mire(ctx, log.INFO, []byte("Processing HTTP request"))

    // Add user-specific context
    ctx = util.WithUserID(ctx, getUserID(r))

    // Use Mire API with fields
    log.Mire(ctx, log.INFO,
        []byte("Request details"),
        []byte("path"), []byte(r.URL.Path),
        []byte("method"), []byte(r.Method))
}

Custom Hook Integration

// Implement a custom hook
type CustomHook struct {
    endpoint string
}

func (h *CustomHook) Fire(entry *core.LogEntry) error {
    // Send log entry to external service
    payload, err := json.Marshal(entry)
    if err != nil {
        return err
    }

    resp, err := http.Post(h.endpoint, "application/json", bytes.NewBuffer(payload))
    if err != nil {
        return err
    }
    defer resp.Body.Close()

    return nil
}

func (h *CustomHook) Close() error {
    // Cleanup resources
    return nil
}

// Use the custom hook
customHook := &CustomHook{endpoint: "https://logs.example.com/api"}
log := logger.New(logger.LoggerConfig{
    Level: core.INFO,
    Output: os.Stdout,
    Hooks: []hook.Hook{customHook},
    Formatter: &formatter.TextFormatter{
        EnableColors:  true,
        ShowTimestamp: true,
    },
})

Log Rotation Configuration

rotationConfig := &config.RotationConfig{
    MaxSize:    100, // 100MB
    MaxAge:     30,  // 30 days
    MaxBackups: 5,   // Keep 5 old files
    Compress:   true, // Compress rotated files
}

logger := logger.New(logger.LoggerConfig{
    Level:          core.INFO,
    Output:         os.Stdout,
    EnableRotation: true,
    RotationConfig: rotationConfig,
    Formatter: &formatter.JSONFormatter{
        TimestampFormat: "2006-01-02T15:04:05.000Z07:00",
    },
})

🔧 Advanced Configuration

Environment-Based Configuration

func getLoggerForEnv(env string) *logger.Logger {
    baseConfig := logger.LoggerConfig{
        Formatter: &formatter.JSONFormatter{
            ShowTimestamp: true,
            ShowCaller:    true,
        },
        ShowHostname:    true,
        ShowApplication: true,
        Environment:     env,
    }

    switch env {
    case "production":
        baseConfig.Level = core.INFO
        baseConfig.Output = os.Stdout
    case "development":
        baseConfig.Level = core.DEBUG
        baseConfig.Formatter = &formatter.TextFormatter{
            EnableColors:  true,
            ShowTimestamp: true,
            ShowCaller:    true,
        }
    case "testing":
        baseConfig.Level = core.WARN
        baseConfig.Output = io.Discard // Discard logs during testing
    }
    return logger.New(baseConfig)
}

Conditional Logging Based on Context

func conditionalLog(ctx context.Context) {
    // Extract user role from context and adjust logging behavior
    userRole := ctx.Value("role")
    if userRole == "admin" {
        log.Mire(ctx, log.INFO, []byte("Admin action performed"))
    } else {
        action := fmt.Sprintf("%v", ctx.Value("action"))
        log.Mire(ctx, log.DEBUG,
            []byte("Regular user action"),
            []byte("action"), []byte(action))
    }
}

Custom Metrics Integration

import "github.com/Luvion1/mire/metric"

// Create a custom metrics collector
customMetrics := metric.NewDefaultMetricsCollector()

log := logger.New(logger.LoggerConfig{
    Level:            core.INFO,
    Output:           os.Stdout,
    EnableMetrics:    true,
    MetricsCollector: customMetrics,
    Formatter: &formatter.TextFormatter{
        EnableColors:  true,
        ShowTimestamp: true,
    },
})

// Use the logger with Mire API
log.Mire(context.Background(), log.INFO, []byte("Test message"))

// Access metrics
count := customMetrics.GetCounter("log.info")

Custom Context Extractor

// Define a custom context extractor function
func customContextExtractor(ctx context.Context) map[string]string {
    result := make(map[string]string)

    // Extract custom values from context
    if reqID := ctx.Value("request_id"); reqID != nil {
        if idStr, ok := reqID.(string); ok {
            result["request_id"] = idStr
        }
    }

    if tenantID := ctx.Value("tenant_id"); tenantID != nil {
        if idStr, ok := tenantID.(string); ok {
            result["tenant"] = idStr
        }
    }

    return result
}

// Use the custom extractor in logger config
log := logger.New(logger.LoggerConfig{
    Level:             core.INFO,
    Output:            os.Stdout,
    ContextExtractor:  customContextExtractor,
    Formatter: &formatter.JSONFormatter{
        ShowTimestamp: true,
        ShowTraceInfo: true,
    },
})

🤝 Contributing

We welcome contributions to the Mire project!

Getting Started

Fork the repository
Create a feature branch
Make your changes
Add tests for new functionality
Ensure all tests pass
Submit a pull request

Development Setup

# Clone your fork
git clone https://github.com/YOUR_USERNAME/mire.git
cd mire

# Install dependencies
go mod tidy

# Run tests
go test ./...

# Run benchmarks
go test -bench=. ./...

Code Standards

Follow Go formatting conventions (go fmt)
Write comprehensive tests for new features
Document exported functions and types
Maintain backward compatibility when possible
Write clear commit messages

📄 License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

📞 Support

Need help? Join our community:

Issues: GitHub Issues
Discussions: GitHub Discussions

📄 Changelog

v0.0.4 - Zero-Allocation Redesign and Test Suite Fixes

Major Enhancement: Complete internal redesign with []byte fields to eliminate string conversion overhead
Performance: Achieved near-zero allocation performance with improved formatter efficiency
Architecture: Refactored core components for memory hierarchy optimization
Features: Enhanced context extraction and distributed tracing support
Bug Fixes: Fixed concurrent metrics counter race conditions and unused import errors
Testing: Fixed 50+ test errors across all packages, updated for type safety with map[string][]byte, ensured 100% test coverage and build stability

v0.0.3 - Enhanced Features

Added support for custom context extractors
Implemented advanced field transformers
Introduced log sampling for high-volume scenarios
Added comprehensive test coverage
Improved documentation and examples

v0.0.2 - Feature Expansion

Added JSON and CSV formatters
Implemented hook system for custom log processing
Added log rotation capabilities
Enhanced asynchronous logging
Added metrics collection

v0.0.1 - Initial Release

Basic text logging with color support
Context-aware logging with trace IDs
Structured logging with fields
Simple configuration options

Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
.github		.github
config		config
core		core
errors		errors
example		example
formatter		formatter
hook		hook
log		log
logger		logger
metric		metric
sampler		sampler
util		util
writer		writer
.gitignore		.gitignore
.goreleaser.yml		.goreleaser.yml
CHANGELOG.md		CHANGELOG.md
LICENSE		LICENSE
README.md		README.md
benchmark_test.go		benchmark_test.go
go.mod		go.mod
main.go		main.go
main_test.go		main_test.go

License

Luvion1/mire

Folders and files

Latest commit

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Mire - Go Logging Library

📋 Table of Contents

🚀 Highlights

✨ Features

Core Performance

Logging Capabilities

Advanced Features

🚀 Installation

Prerequisites

Getting Started

Version Management

⚡ Quick Start

Single Public API: Mire

Mire API Signature

Log Levels

Advanced Usage

Using Custom Logger with Mire API

⚙️ Configuration Options

Logger Configuration

Text Formatter Options

CSV Formatter Options

JSON Formatter Options

🧪 Testing

Benchmark Results (vv0.0.6)

📊 Performance

Memory Allocation Benchmarks (vv0.0.6)

Core Operations Performance

Allocation per Logging Operation by Level

Allocation Comparison by Formatter (vv0.0.6)

Throughput Benchmarks (vv0.0.6)

Throughput by Number of Fields

Throughput by Log Level

Throughput by Formatter (vv0.0.6)

Special Benchmark Results

Concurrent Logging Performance

Performance Conclusion (vv0.0.6)

🏗️ Architecture

Key Components

📚 Examples

Zero-Allocation Logging Example

CSV Formatter Usage

Asynchronous Logging

Context-Aware Logging with Distributed Tracing

Custom Hook Integration

Log Rotation Configuration

🔧 Advanced Configuration

Environment-Based Configuration

Conditional Logging Based on Context

Custom Metrics Integration

Custom Context Extractor

🤝 Contributing

Getting Started

Development Setup

Code Standards

📄 License

📞 Support

📄 Changelog

v0.0.4 - Zero-Allocation Redesign and Test Suite Fixes

v0.0.3 - Enhanced Features

v0.0.2 - Feature Expansion

v0.0.1 - Initial Release

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