---
title: Sink
description: Migrate deprecated page-pool writers to RenderBuffer.
---

The deprecated page-pool writer has been removed. Use `RenderBuffer`, which owns
and recycles its pages, for synchronous, asynchronous, and streaming rendering.
See [WriteBuf](/docs/core/write-buf) and [Streaming SSR](/docs/core/streaming-ssr).

Custom transport adapters can still implement `StreamChunkFlusher` or
`SendStreamChunkFlusher`; those transport boundaries remain supported.