Deno

Linux & Mac	Windows

Deno is a program for executing JavaScript and TypeScript outside of the web browser.

github.com/denoland/deno

Documentation

API Reference

Deno standard modules

Getting started

Install Deno into ~/.deno/bin

curl -L https://deno.land/x/install/install.py | python
export PATH=$HOME/.deno/bin:$PATH

Try a Deno program. Install by bash alias. This one serves a local directory in HTTP.

alias file_server="deno \
  https://deno.land/x/net/file_server.ts --allow-net"

Run it:

% file_server .
Downloading https://deno.land/x/net/file_server.ts...
[...]
HTTP server listening on http://0.0.0.0:4500/

And if you ever want to upgrade to the latest published version:

file_server --reload

Benchmarks

Execution time

This shows how much time total it takes to run a few simple deno programs: tests/002_hello.ts and tests/003_relative_import.ts. For deno to execute typescript, it must first compile it to JS. A warm startup is when deno has a cached JS output already, so it should be fast because it bypasses the TS compiler. A cold startup is when deno must compile from scratch.

Throughput

Time it takes to pipe a certain amount of data through Deno. echo_server.ts and cat.ts Smaller is better.

Req/Sec

Tests HTTP server performance. 10 keep-alive connections do as many hello-world requests as possible. Bigger is better.

deno is a fake http server that doesn't parse HTTP. It is comparable to node_tcp.
deno_net_http is a web server written in TypeScript. It is comparable to node_http.
hyper is a Rust HTTP server and represents an upper bound.

Executable size

deno ships only a single binary. We track its size here.

Thread count

How many threads various programs use.

Syscall count

How many total syscalls are performed when executing a given script.

Travis

How long for Travis CI to return a green status for pull requests.

References

All benchmark data