# Dragonfly

Neutron uses **Dragonfly** as its primary engine for caching, sessions, and background jobs.

## What is Dragonfly?

Dragonfly is a modern, multithreaded, drop-in replacement for Redis. It supports the same wire protocol but offers significantly higher performance.

-   **25x Throughput**: On multi-core systems, Dragonfly utilizes all available cores.
-   **Memory Efficient**: Uses up to 30% less memory than Redis in many scenarios.
-   **No Snapshots Spikes**: Avoids the memory spikes common during Redis snapshots.

## Usage in Neutron

You don't need to learn a new API. Neutron uses standard Redis-compatible clients under the hood.

### Caching

```ts
// Using the unified cache module
await context.cache.set("key", "value", { ttl: 60 });
```

### Sessions

Sessions are automatically stored in Dragonfly by the `nucleus` session module, ensuring your app servers remain stateless and easy to scale.

### Queues (BullMQ)

Neutron integrates with **BullMQ** for background job processing, using Dragonfly as the backend.

```ts
// Define a job
export const myJob = defineJob("process-video", async (data) => {
  // heavy processing...
});

// Trigger a job from an action
await myJob.enqueue({ id: 123 });
```