---
title: Publishers.PrefetchStrategy
framework: combine
role: symbol
role_heading: Enumeration
path: combine/publishers/prefetchstrategy
---

# Publishers.PrefetchStrategy

A strategy for filling a buffer.

## Declaration

```swift
enum PrefetchStrategy
```

## Topics

### Prefetching strategies

- [Publishers.PrefetchStrategy.byRequest](combine/publishers/prefetchstrategy/byrequest.md)
- [Publishers.PrefetchStrategy.keepFull](combine/publishers/prefetchstrategy/keepfull.md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)

## See Also

### Buffering elements

- [buffer(size:prefetch:whenFull:)](combine/publisher/buffer(size:prefetch:whenfull:).md)
- [Publishers.BufferingStrategy](combine/publishers/bufferingstrategy.md)