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A modern runtime for JavaScript and TypeScript.
https://deno.com/
084eafe508
Max rps without a signal is unchanged, however we can drastically reduce memory usage by not creating the signal until needed, and we can optimize the rps in the case where the signal is created. With a quick memory benchmark, it looks like this helps pretty drastically with # of GCs when benchmarking w/wrk: - 1.42.4: 1763 - canary: 1093 - this patch: 874 This branch: ``` Running 10s test @ http://localhost:8080/ 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 87.33us 439.95us 20.68ms 99.67% Req/Sec 66.70k 6.39k 74.11k 83.66% 1340255 requests in 10.10s, 191.73MB read Requests/sec: 132696.90 Transfer/sec: 18.98MB cpu: Apple M2 Pro runtime: deno 1.43.0 (aarch64-apple-darwin) file:///Users/matt/Documents/scripts/bench_request.js benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------------------------- ----------------------------- newRequest 986.5 ns/iter 1,013,682.6 (878.2 ns … 1.18 µs) 1.01 µs 1.18 µs 1.18 µs newAbortController 18 ns/iter 55,541,104.1 (15.6 ns … 42.62 ns) 17.71 ns 25.05 ns 26.27 ns newAbortControllerSignal 18.66 ns/iter 53,578,966.7 (16.49 ns … 32.16 ns) 18.71 ns 25.67 ns 26.39 ns newAbortControllerSignalOnAbort 106.49 ns/iter 9,390,164.9 (97.87 ns … 120.61 ns) 108.6 ns 114.24 ns 115.89 ns newAbortControllerSignalAddEventListener 86.92 ns/iter 11,504,880.2 (81.88 ns … 103.15 ns) 90 ns 98.28 ns 99.55 ns newAbortControllerSignalOnAbortNoListener 3.01 µs/iter 331,964.4 (2.97 µs … 3.1 µs) 3.06 µs 3.1 µs 3.1 µs newAbortControllerSignalOnAbortAbort 3.26 µs/iter 306,662.6 (3.22 µs … 3.36 µs) 3.27 µs 3.36 µs 3.36 µs ``` Latest canary: ``` Running 10s test @ http://localhost:8080/ 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 72.86us 71.23us 4.47ms 99.05% Req/Sec 64.66k 5.54k 72.48k 82.18% 1299015 requests in 10.10s, 185.83MB read Requests/sec: 128616.02 Transfer/sec: 18.40MB cpu: Apple M2 Pro runtime: deno 1.43.0+bc4aa5f (aarch64-apple-darwin) file:///Users/matt/Documents/scripts/bench_request.js benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------------------------- ----------------------------- newRequest 1.25 µs/iter 800,005.2 (1.01 µs … 4.18 µs) 1.16 µs 4.18 µs 4.18 µs newAbortController 18.56 ns/iter 53,868,204.3 (16.04 ns … 38.73 ns) 18.38 ns 26.1 ns 26.63 ns newAbortControllerSignal 18.72 ns/iter 53,430,746.1 (16.13 ns … 36.71 ns) 18.71 ns 26.19 ns 26.98 ns newAbortControllerSignalOnAbort 193.91 ns/iter 5,156,992.4 (184.25 ns … 211.41 ns) 194.96 ns 207.87 ns 209.4 ns newAbortControllerSignalAddEventListener 171.45 ns/iter 5,832,569.2 (153 ns … 182.03 ns) 176.17 ns 180.75 ns 181.05 ns newAbortControllerSignalOnAbortNoListener 3.07 µs/iter 326,263.3 (2.98 µs … 3.17 µs) 3.08 µs 3.17 µs 3.17 µs newAbortControllerSignalOnAbortAbort 3.32 µs/iter 301,344.6 (3.29 µs … 3.4 µs) 3.33 µs 3.4 µs 3.4 µs ``` |
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| .cargo | ||
| .devcontainer | ||
| .github | ||
| bench_util | ||
| cli | ||
| ext | ||
| runtime | ||
| tests | ||
| 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
(/ˈdiːnoʊ/, pronounced
dee-no) is a JavaScript, TypeScript, and WebAssembly runtime with secure
defaults and a great developer experience. It's built on V8,
Rust, and Tokio.
Learn more about the Deno runtime in the documentation.
Installation
Install the Deno runtime on your system using one of the commands below. Note that there are a number of ways to install Deno - a comprehensive list of installation options can be found here.
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
Build and install from source
Complete instructions for building Deno from source can be found in the manual here.
Your first Deno program
Deno can be used for many different applications, but is most commonly used to
build web servers. Create a file called server.ts and include the following
TypeScript code:
Deno.serve((_req: Request) => {
return new Response("Hello, world!");
});
Run your server with the following command:
deno run --allow-net server.ts
This should start a local web server on http://localhost:8000.
Learn more about writing and running Deno programs in the docs.
Additional resources
- Deno Docs: official guides and reference docs for the Deno runtime, Deno Deploy, and beyond.
- Deno Standard Library: officially supported common utilities for Deno programs.
- deno.land/x: registry for third-party Deno modules.
- Developer Blog: Product updates, tutorials, and more from the Deno team.
Contributing
We appreciate your help! To contribute, please read our contributing instructions.