https://github.com/swashcap/fastify-als-demo

A demo with Fastify and Node.js's AsyncLocalStorage
https://github.com/swashcap/fastify-als-demo

fastify nodejs

Last synced: 5 days ago
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A demo with Fastify and Node.js's AsyncLocalStorage

• Host: GitHub
• URL: https://github.com/swashcap/fastify-als-demo
• Owner: swashcap
• License: mit
• Created: 2020-05-04T16:51:54.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-03-26T15:44:43.000Z (over 2 years ago)
• Last Synced: 2023-04-01T03:28:59.561Z (over 1 year ago)
• Topics: fastify, nodejs
• Language: TypeScript
• Size: 452 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 6
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# fastify-als-demo

A demo with [Fastify](https://www.fastify.io) and Node.js's

[`AsyncLocalStorage`](https://nodejs.org/api/async_hooks.html#async_hooks_class_asynclocalstorage).

## Performance comparison:

Some basic metrics when running locally on the dev machine:

```shell

ab -n 1000 -c 10 "http://127.0.0.1:3000/"

```

### async-local-storage

* Maximum MEM (via `top`): 23M

* Requests (via `ab`):

    ```

    Requests per second:    93.49 [#/sec] (mean)

    Time per request:       106.967 [ms] (mean)

    Time per request:       10.697 [ms] (mean, across all concurrent requests)

    ```

### logger-passing

* Maximum MEM (via `top`): 27M

* Requests (via `ab`):

    ```

    Requests per second:    93.56 [#/sec] (mean)

    Time per request:       106.880 [ms] (mean)

    Time per request:       10.688 [ms] (mean, across all concurrent requests)

    ```

## Setup

With [Node.js](https://nodejs.org/en/) (>=14.1.x) and

[yarn](https://yarnpkg.com) (>=1.22.x) installed:

1. Install dependencies:

    ```shell

    yarn

    ```

2. Build the project:

    ```shell

    yarn build

    ```

3. Run the server:

    ```shell

    yarn start

    ```

4. Send a request:

    ```shell

    curl localhost:3000

    {"data":{"mock":"mock"}}

    ```

You should see trace-able `requestId` properties on log events. For example,

with `yarn --silent start | jq`:

```shell

{

  "level": 30,

  "time": 1588610966799,

  "pid": 5721,

  "hostname": "swash.local",

  "reqId": 1,

  "req": {

    "method": "GET",

    "url": "/",

    "hostname": "localhost:3000",

    "remoteAddress": "127.0.0.1",

    "remotePort": 54634

  },

  "requestId": "382a4b0b-fc29-4e12-9862-10bc300ce2bb",

  "msg": "incoming request"

}

{

  "level": 30,

  "time": 1588610966902,

  "pid": 5721,

  "hostname": "swash.local",

  "mockApi": "1.0.0",

  "message": "end",

  "requestId": "382a4b0b-fc29-4e12-9862-10bc300ce2bb"

}

{

  "level": 30,

  "time": 1588610966907,

  "pid": 5721,

  "hostname": "swash.local",

  "reqId": 1,

  "res": {

    "statusCode": 200

  },

  "responseTime": 108.17437699995935,

  "requestId": "382a4b0b-fc29-4e12-9862-10bc300ce2bb",

  "msg": "request completed"

}

```