Richard Feldman
e5ca2f0aae
## Problem Profiling showed that during agent streaming, `thread.rs:1393:23` was appearing constantly as a hotspot. The issue was that every single token from the model triggered: 1. `this.update(cx, ...)` 2. `handle_text_event()` (or thinking/redacted_thinking) 3. `cx.notify()` 4. UI re-render This created significant foreground thread pressure, contributing to ~500ms delays visible in the profiler. ## Solution Batch all immediately-available events using `now_or_never()` and process them in a single `update()` call with one `notify()` at the end. This approach is deterministic - it processes exactly what's available right now, adapting naturally to network speed: - When tokens arrive slowly, you get one at a time - When they arrive in bursts, they batch automatically ## Changes - Remove `cx.notify()` from `handle_text_event`, `handle_thinking_event`, and `handle_redacted_thinking_event` - Batch events in the streaming loop using `now_or_never()` - Call `cx.notify()` once per batch instead of per-event - Keep `cx.notify()` in `handle_tool_use_event` for immediate tool feedback Release Notes: - Improve streaming tool call performance by batching UI updates.
Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Installation
On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).
Other platforms are not yet available:
- Web (tracking issue)
Developing Zed
Contributing
See CONTRIBUTING.md for ways you can contribute to Zed.
Also... we're hiring! Check out our jobs page for open roles.
Licensing
License information for third party dependencies must be correctly provided for CI to pass.
We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:
- Is it showing a
no license specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.