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A modern runtime for JavaScript and TypeScript.
https://deno.com/
022aae9854
This commits changes "deno_core" to use jemalloc allocator as an allocator for V8 array buffers. This greatly improves our GC characteristics as we are using a lot of short lived array buffers. They no longer go through the expensive malloc/free cycle using the default Rust allocator, but instead use jemallocator's memory pool. As a result the flamegraphs for WS/HTTP server flamegraphs no longer show stacks for malloc/free around ops that use ZeroCopyBuf and &[u8]. --------- Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com> |
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.cargo | ||
.devcontainer | ||
.github | ||
bench_util | ||
cli | ||
core | ||
ext | ||
ops | ||
runtime | ||
serde_v8 | ||
test_ffi | ||
test_napi | ||
test_util | ||
third_party@ee59830ca2 | ||
tools | ||
.dlint.json | ||
.dprint.json | ||
.editorconfig | ||
.gitattributes | ||
.gitignore | ||
.gitmodules | ||
.rustfmt.toml | ||
Cargo.lock | ||
Cargo.toml | ||
LICENSE.md | ||
README.md | ||
Releases.md | ||
rust-toolchain.toml |
Deno
Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.
Features
- Secure by default. No file, network, or environment access, unless explicitly enabled.
- Provides
web platform functionality and APIs,
e.g. using ES modules, web workers, and
fetch()
. - Supports TypeScript out of the box.
- Ships only a single executable file.
- Built-in tooling including
deno test
,deno fmt
,deno bench
, and more. - Includes a set of reviewed standard modules guaranteed to work with Deno.
- Supports npm.
Install
Shell (Mac, Linux):
curl -fsSL https://deno.land/install.sh | sh
PowerShell (Windows):
irm https://deno.land/install.ps1 | iex
Homebrew (Mac):
brew install deno
Chocolatey (Windows):
choco install deno
Scoop (Windows):
scoop install deno
Build and install from source using Cargo:
cargo install deno --locked
See deno_install and releases for other options.
Getting Started
deno run https://deno.land/std/examples/welcome.ts
Or setup a simple HTTP server:
import { serve } from "https://deno.land/std@0.182.0/http/server.ts";
serve((_req) => new Response("Hello, World!"));
Additional Resources
- The Deno Manual is a great starting point for additional examples, setting up your environment, using npm, and more.
- Runtime API reference documents all APIs built into Deno CLI.
- Deno Standard Modules do not have external dependencies and are reviewed by the Deno core team.
- deno.land/x is the registry for third party modules.
- Blog is where the Deno team shares important product updates and "how to"s, about solving technical problems.
Contributing
We appreciate your help!
To contribute, please read our contributing instructions.