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Kirill Bulatov 347995bc74 markdown: Cache code block syntax highlighting at parse time instead of re-highlighting every frame
MarkdownElement used to call Language::highlight_text (a full tree-sitter
parse) for every code block on every render, which made agent panel streaming
with code blocks noticeably janky.

Highlights are now computed once in the background parse task and stored on
ParsedMarkdown as capture-id stacks, which survive theme changes (resolved
through the current HighlightMap at render).

Language::highlight_text_captures memoizes its results in a per-grammar,
cost-budgeted (4MB, verified by full text comparison on hash hits) LRU cache,
so streaming appends reuse the captures of unchanged code blocks instead of
re-parsing them; texts over 512KB bypass the cache and are highlighted
directly.

The capture flattening moves into syntax_map as flatten_capture_regions,
fixing region splitting for overlapping (non-nested) captures on the way, and
capture ids get a CaptureId newtype.
2026-08-21 16:11:15 +02:00
.agents/skills Add dylint lint library for Zed-specific patterns (#58496) 2026-07-03 22:05:34 +00:00
.cargo livekit: Use our build of libwebrtc.a (#51433) 2026-03-16 10:47:36 +01:00
.cloudflare Improve docs AI readiness (#59577) 2026-07-08 20:54:51 +00:00
.config Increase timeout for test_random_blocks (#50724) 2026-03-04 12:25:12 -05:00
.factory Add humanizer skill for AI writing pattern detection (#50021) 2026-02-24 14:58:52 -06:00
.github Automate cleanup of unsigned and stale draft pull requests (#62936) 2026-08-21 07:53:28 +00:00
.wezel Add wezel scenario for an incremental editor build (#62016) 2026-08-02 18:40:37 +00:00
.zed agent: Remove old edit file tool (#55612) 2026-05-04 09:54:39 +00:00
assets Add configurable inline completion debounce timeout (#61568) 2026-08-20 16:42:42 +00:00
ci Move Nightly release to gh-workflow (#41349) 2025-10-28 13:57:23 -06:00
crates markdown: Cache code block syntax highlighting at parse time instead of re-highlighting every frame 2026-08-21 16:11:15 +02:00
docs Revise extension publishing documentation (#62767) 2026-08-21 10:06:24 +00:00
extensions proto: Bump to v0.3.3 (#62396) 2026-08-12 08:35:43 +00:00
legal legal: Use absolute URLs for Terms of Service and Privacy Policy links (#62684) 2026-08-17 09:35:54 +00:00
nix Switch from cargo-machete to cargo-shear (#62643) 2026-08-20 10:08:48 +00:00
script Automate cleanup of unsigned and stale draft pull requests (#62936) 2026-08-21 07:53:28 +00:00
tooling Switch from cargo-machete to cargo-shear (#62643) 2026-08-20 10:08:48 +00:00
.git-blame-ignore-revs Add PR 50413 to .git-blame-ignore-revs (#50421) 2026-03-01 00:50:33 +01:00
.gitattributes
.gitignore csv_preview: Add single-line row displaying mode (#61127) 2026-07-16 19:28:22 +00:00
.mailmap Update .mailmap (#47413) 2026-01-22 23:57:26 +05:30
.prettierrc
.rules Fix typo in .rules (#61693) 2026-07-27 05:59:53 +00:00
AGENTS.md ai: Symlink an AGENTS.md file to .rules (#45939) 2026-01-19 15:29:42 +01:00
Cargo.lock markdown: Cache code block syntax highlighting at parse time instead of re-highlighting every frame 2026-08-21 16:11:15 +02:00
Cargo.toml Switch from cargo-machete to cargo-shear (#62643) 2026-08-20 10:08:48 +00:00
CLAUDE.md
clippy.toml Revert "Revert scheduler update (#46659)" (#46671) 2026-01-14 07:19:13 +00:00
CODE_OF_CONDUCT.md
compose.yml Remove Postgres and stripe-mock from Docker Compose (#48313) 2026-02-04 03:42:58 +00:00
CONTRIBUTING.md Update issues link in CONTRIBUTING.md (#62937) 2026-08-20 12:23:30 +00:00
debug.plist
default.nix nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
Dockerfile-collab Bump rustc to 1.97 (#62395) 2026-08-09 22:29:52 +00:00
Dockerfile-collab.dockerignore
Dockerfile-cross.dockerignore
Dockerfile-distros Removal of mold/wild scripts and mentions in docs (#53078) 2026-04-08 21:20:02 +03:00
Dockerfile-distros.dockerignore
flake.lock Bump rustc to 1.97 (#62395) 2026-08-09 22:29:52 +00:00
flake.nix ci: Remove garnix substitutor (#58033) 2026-05-29 05:56:42 +00:00
GEMINI.md
LICENSE-APACHE
LICENSE-GPL
livekit.yaml
lychee.toml
Procfile
Procfile.web Remove PostgREST (#41299) 2025-10-27 13:27:59 -04:00
README.md docs: Remove readme junk (#60008) 2026-06-27 15:06:29 +00:00
renovate.json
REVIEWERS.conl Remove past reviewer (#51767) 2026-03-17 16:34:35 +00:00
rust-toolchain.toml Bump rustc to 1.97 (#62395) 2026-08-09 22:29:52 +00:00
rustfmt.toml nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
shell.nix nix: Use flake-parts, partitions, and treefmt-nix (#45321) 2026-02-02 14:26:42 +00:00
typos.toml editor: Align selections by display position instead of byte column (#61997) 2026-08-14 00:20:27 +00:00

Zed

Zed CI

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:

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

Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.

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 specified error for a crate you've created? If so, add publish = false under [package] in your crate's Cargo.toml.
  • Is the error failed to satisfy license requirements for 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 the accepted array in script/licenses/zed-licenses.toml.
  • Is cargo-about unable to find the license for a dependency? If so, add a clarification field at the end of script/licenses/zed-licenses.toml, as specified in the cargo-about book.

Sponsorship

Zed is developed by Zed Industries, Inc., a for-profit company.

If youd 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.