Carom.Telemetry.OpenTelemetry 1.0.2

Carom 🎱

A lean, fast, and safe resilience library for .NET

Carom is a zero-dependency resilience library that enforces best practices by default. Named after the billiards shot where the ball bounces before reaching its target, Carom helps your code gracefully handle failures.

🎯 Why Carom?

• Zero Dependencies (core packages)
• Minimal Allocations (<100 bytes on hot path)
• Safe by Default (mandatory decorrelated jitter)
• Tiny Footprint (13KB core, 20KB extensions)
• Fully Composable (all patterns work together)

📦 Packages

🚀 Quick Start

Installation

dotnet add package Carom
dotnet add package Carom.Extensions

Basic Usage

using Carom;

// Simple retry with exponential backoff
var result = await Carom.ShotAsync(() => api.CallAsync(), retries: 3);

// With timeout
var bounce = Bounce.Times(5).WithTimeout(TimeSpan.FromSeconds(30));
var data = await Carom.ShotAsync(() => apiClient.FetchAsync(), bounce);

Circuit Breaker

using Carom.Extensions;

var cushion = Cushion.ForService("payment-api")
    .OpenAfter(failures: 5, within: 10)
    .HalfOpenAfter(TimeSpan.FromSeconds(30));

var payment = await CaromCushionExtensions.ShotAsync(
    () => paymentApi.Charge(), 
    cushion);

Fallback

var config = await new Func<Task<AppConfig>>(() => configService.LoadAsync())
    .PocketAsync(AppConfig.Default);

Bulkhead

var dbCompartment = Compartment.ForResource("database")
    .WithMaxConcurrency(10)
    .Build();

var query = await CaromCompartmentExtensions.ShotAsync(
    () => db.QueryAsync(sql), 
    dbCompartment);

Rate Limiting

var apiThrottle = Throttle.ForService("external-api")
    .WithRate(100, TimeSpan.FromSeconds(1))
    .WithBurst(20)
    .Build();

var apiResult = await CaromThrottleExtensions.ShotAsync(
    () => apiClient.CallAsync(), 
    apiThrottle);

🎓 Patterns

�� Documentation

• Security Policy
• Assembly Signing
• Changelog

🤝 Contributing

Contributions welcome! Please read our contributing guidelines first.

📄 License

MPL-2.0 - see LICENSE for details.

🙏 Acknowledgments

Built with the Baryo.Dev philosophy: zero dependencies, minimal allocations, safe by default.

Made with ❤️ by Baryo.Dev

📊 Performance

Carom is significantly faster than Polly v8:

• 175,000x faster startup (0.02ns vs 3,857ns)
• 15x faster hot path (10.9ns vs 167.8ns)
• 4.8x faster async operations (45ns vs 216ns)

See detailed benchmarks for complete analysis.