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A modern runtime for JavaScript and TypeScript. https://deno.com/
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Marcos Casagrande 6b1a976181
perf(ext/http): use ServeHandlerInfo class instead of object literal (#20122)
This PR improves performance of `Deno.Serve` when providing `info`
argument by creating `ServeHandlerInfo` class instead of creating an
object literal with a getter on every request.

```js
Deno.serve((_req, info) => new Response(info.remoteAddr.transport) });
```

### Benchmarks
```
wrk -d 10s --latency http://127.0.0.1:4500
Running 10s test @ http://127.0.0.1:4500
  2 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    42.34us   16.30us   1.66ms   95.88%
    Req/Sec   118.17k     2.95k  127.38k    76.73%
  Latency Distribution
     50%   38.00us
     75%   41.00us
     90%   56.00us
     99%   83.00us
  2375298 requests in 10.10s, 319.40MB read
Requests/sec: 235177.04
Transfer/sec:     31.62MB
```

**main**
```
wrk -d 10s --latency http://127.0.0.1:4500
Running 10s test @ http://127.0.0.1:4500
  2 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    78.86us  211.06us   3.58ms   96.52%
    Req/Sec   105.90k     4.35k  117.41k    78.22%
  Latency Distribution
     50%   41.00us
     75%   53.00us
     90%   62.00us
     99%    1.18ms
  2127534 requests in 10.10s, 286.09MB read
Requests/sec: 210647.49
Transfer/sec:     28.33MB
```

```
cpu: 13th Gen Intel(R) Core(TM) i9-13900H
runtime: deno 1.36.0 (x86_64-unknown-linux-gnu)

benchmark                 time (avg)        iter/s             (min … max)       p75       p99      p995
-------------------------------------------------------------------------- -----------------------------
new ServeHandlerInfo      3.43 ns/iter 291,508,889.3    (3.07 ns … 12.21 ns)   3.42 ns   3.84 ns   3.87 ns
{} with getter           133.84 ns/iter   7,471,528.9   (92.9 ns … 458.95 ns) 132.45 ns 364.96 ns 429.43 ns
```


----
### Drawbacks:

`.remoteAddr` is now not enumerable

```
ServeHandlerInfo {}
```
vs
```
{ remoteAddr: [Getter] }
```
It'll break any code trying to iterate through `info` keys (Doubt
there's anyone doing it though)

```js
Deno.serve((req, info) => {
  console.log(Object.keys(info).length === 0) // true;
  return new Response("yes");
});
2023-08-10 19:45:55 +02:00
.cargo fix: reload config files on watcher restarts (#19487) 2023-06-14 22:29:19 +00:00
.devcontainer chore: update devcontainer configuration (#15751) 2022-09-03 02:21:41 +02:00
.github chore: forward v1.36.1 to main (#20119) 2023-08-10 16:44:41 +03:00
bench_util chore: forward v1.36.1 to main (#20119) 2023-08-10 16:44:41 +03:00
cli chore: forward v1.36.1 to main (#20119) 2023-08-10 16:44:41 +03:00
ext perf(ext/http): use ServeHandlerInfo class instead of object literal (#20122) 2023-08-10 19:45:55 +02:00
runtime chore: forward v1.36.1 to main (#20119) 2023-08-10 16:44:41 +03:00
test_ffi chore: update to Rust 1.71 (#19822) 2023-07-13 15:16:24 -06:00
test_napi fix(napi): update env_test.js (#19876) 2023-07-19 12:36:52 +02:00
test_util chore: upgrade fastwebsockets to 0.4.4 (#19089) 2023-08-10 09:59:06 +05:30
third_party@7f1a41fee1 chore: upgrade to dprint 0.40 internally (#19998) 2023-07-31 17:10:10 +02:00
tools fix(ext/abort): trigger AbortSignal events in correct order (#20095) 2023-08-08 12:05:42 +02:00
.dlint.json chore: update dlint to v0.37.0 for GitHub Actions (#17295) 2023-01-16 17:17:18 +01:00
.dprint.json fix(fmt): do not insert expr stmt leading semi-colon in do while stmt body (#20093) 2023-08-08 09:15:19 -04:00
.editorconfig editorconfig: Don't insert final newline in .out files (#1686) 2019-02-07 11:31:49 -05:00
.gitattributes fix(test): support typechecking docs with CRLF line endings (#12748) 2021-11-15 09:58:04 -05:00
.gitignore feat(cli): Adding JUnit test reports (#19747) 2023-07-27 00:12:35 +02:00
.gitmodules chore: check node_compat config diff in CI (#19119) 2023-05-15 21:22:53 +09:00
.rustfmt.toml chore: update copyright year to 2023 (#17247) 2023-01-02 21:00:42 +00:00
Cargo.lock chore: forward v1.36.1 to main (#20119) 2023-08-10 16:44:41 +03:00
Cargo.toml chore: forward v1.36.1 to main (#20119) 2023-08-10 16:44:41 +03:00
LICENSE.md chore: update copyright year to 2023 (#17247) 2023-01-02 21:00:42 +00:00
README.md docs: nitpick README (#19912) 2023-07-25 14:44:50 +09:00
Releases.md chore: forward v1.36.1 to main (#20119) 2023-08-10 16:44:41 +03:00
rust-toolchain.toml chore: update to Rust 1.71 (#19822) 2023-07-13 15:16:24 -06:00

Deno

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the deno mascot dinosaur standing in the rain

Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.

Features

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

Try running a simple program:

deno run https://deno.land/std/examples/welcome.ts

Or setup a simple HTTP server:

Deno.serve((_req) => new Response("Hello, World!"));

More Examples

Additional Resources

Contributing

We appreciate your help!

To contribute, please read our contributing instructions.