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A modern runtime for JavaScript and TypeScript.
https://deno.com/
a8a7848c86
This PR optimizes Node's `IncomingMessageForServer.headers` by replacing `Object.fromEntries()` with a loop and `headers.entries` with `headersEntries` which returns the internal array directly instead of an iterator ## Benchmarks Using `wrk` with 5 headers ``` wrk -d 10s --latency -H "X-Deno: true" -H "Accept: application/json" -H "X-Foo: bar" -H "User-Agent: wrk" -H "Accept-Encoding: gzip, br" http://127.0.0.1:3000 ``` **this PR** ``` Running 10s test @ http://127.0.0.1:3000 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 167.53us 136.89us 2.75ms 97.33% Req/Sec 31.98k 1.38k 36.39k 70.30% Latency Distribution 50% 134.00us 75% 191.00us 90% 234.00us 99% 544.00us 642548 requests in 10.10s, 45.96MB read Requests/sec: 63620.36 Transfer/sec: 4.55MB ``` **main** ``` Running 10s test @ http://127.0.0.1:3000 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 181.31us 132.54us 3.79ms 97.13% Req/Sec 29.21k 1.45k 32.93k 79.21% Latency Distribution 50% 148.00us 75% 198.00us 90% 261.00us 99% 545.00us 586939 requests in 10.10s, 41.98MB read Requests/sec: 58114.01 Transfer/sec: 4.16MB ``` ```js import express from "npm:express"; const app = express(); app.get("/", function (req, res) { req.headers; res.end(); }); app.listen(3000); ``` |
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| .cargo | ||
| .devcontainer | ||
| .github | ||
| bench_util | ||
| cli | ||
| ext | ||
| runtime | ||
| test_ffi | ||
| test_napi | ||
| test_util | ||
| third_party@7f1a41fee1 | ||
| 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:
Deno.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.