WebTransport BYOB readers

Category: Network / Connectivity
Type: Chromium catches up
Status: Enabled by default (Chrome 109)
Intent stage: Shipped

Breaking change: No
Enterprise impact: None
Spec maturity: Working draft
Web Platform Tests: Yes

WPT details: https://wpt.fyi/results/webtransport/streams-echo.https.any.html?label=experimental&label=master&aligned

Summary

Support BYOB(bring-your-own-buffer) readers for WebTransport to allow reading into a developer-supplied buffer. BYOB readers can minimize buffer copies, as well as reduce memory allocations.

Motivation

BYOB readers for WebTransport allow more precise memory allocation, minimize buffer copies, and reduce memory allocations.

Standards & signals

Specification: https://www.w3.org/TR/webtransport
Firefox: Positive
Safari: Support
Web developers: No signals
Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1259886

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=webtransport%2Fstreams-echo
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+WebTransport%20BYOB%20readers
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=WebTransport%20BYOB%20readers
Baseline status: https://webstatus.dev/?q=WebTransport%20BYOB%20readers

Samples: https://webrtc.internaut.com/wc/wtSender4

Explainers: https://github.com/w3c/webtransport/issues/35

View on chromestatus.com