Apollo Slow Query

A small (2kb) script for logging out slow queries in Apollo GraphQL.

this is suitable for development purposes to help you find and debug slow queries with Apollo server.

Repo Website

Usage

To use it yarn add @mikevalstar/apolloslowquery

import apolloSlowQuery from '@mikevalstar/apolloslowquery';
import apolloSlowQueryYaml from '@mikevalstar/apolloslowquery/yaml';

const aServer = new ApolloServer({
  schema: schemaWithResolvers,
  plugins: [
    apolloSlowQuery({slow: 20, transport: apolloSlowQueryYaml({folder: path.join(__dirname, 'slow')}), ignoreOperations: ['IntrospectionQuery']}),
  ],
});

Libraries

this project will output to the console by default but we do include the YAML package for use with the yaml transport if you choose to use it

Options

slow - required the threshold in ms that a query is considered slow

transport - a custom transport for teh output data, the default is to log the json view to the console

ignoreOperations - an array of operation names to ignore for specific operations you don't want to log

Sample Output

durationMs: 27.3621
timeUntilExecutionMs: 4.3021
requestedAt: 2022-09-17T15:32:01.250Z
operation: ExampleQueryNew
query: |
  query ExampleQueryNew($blogId: Int!, $userId: Int!) {
    roles {
      display
      notes
    }
    blog(blogId: $blogId) {
      publishedAt
      id
    }
    user(userId: $userId) {
      roles {
        display
        notes
      }
    }
  }
variables:
  blogId: 1
  userId: 1
response: |-
  {
    "roles": [
      {
        "display": "Owner",
        "notes": "Full rights to the plication"
      },
      {
        "display": "Admin",
        "notes": "Can modify global settings"
      },
      {
        "display": "User Admin",
        "notes": "Can manage users"
      },
      {
        "display": "Movie Reviewer",
        "notes": "Can manage movies"
      },
      {
        "display": "Form Builder",
        "notes": "Can create forms"
      }
    ],
    "blog": {
      "publishedAt": null,
      "id": 1
    },
    "user": {
      "roles": [
        {
          "display": "Owner",
          "notes": "Full rights to the plication"
        }
      ]
    }
  }
trace:
  - path: roles
    start: 5.5969
    duration: 2.3473
  - path: roles.0.display
    start: 8.1237
    duration: 0.0466
  - path: roles.0.notes
    start: 8.2163
    duration: 0.0077
  - path: roles.1.display
    start: 8.3109
    duration: 0.0084
  - path: roles.1.notes
    start: 8.3455
    duration: 0.0093
  - path: roles.2.display
    start: 8.3959
    duration: 0.103
  - path: roles.2.notes
    start: 8.5371
    duration: 0.0108
  - path: roles.3.display
    start: 8.5767
    duration: 0.0068
  - path: roles.3.notes
    start: 8.6066
    duration: 0.0093
  - path: roles.4.display
    start: 8.65
    duration: 0.0075
  - path: roles.4.notes
    start: 8.7569
    duration: 0.0082
  - path: user
    start: 7.7654
    duration: 7.2526
  - path: user.roles
    start: 15.1661
    duration: 0.2243
  - path: user.roles.0.display
    start: 15.4911
    duration: 0.0149
  - path: user.roles.0.notes
    start: 15.5373
    duration: 0.004
  - path: blog
    start: 6.2749
    duration: 20.7278
  - path: blog.publishedAt
    start: 27.0924
    duration: 0.0063
  - path: blog.id
    start: 27.1188
    duration: 0.006
errors: []

Custom Transports

By default the system will output to the console, you can use the built in yaml, or json transports as in the example usage above.

If you wish to write your own transport you can pass in a function:

const exampleTransport = (options) => {
  return (output) => {
    console.log(output);
    /*
    format: 
    {
      durationMs, // Overall time taken
      timeUntilExecutionMs, // wait time before execution
      requestedAt, // Date() of the request
      operation, // Operation name
      query, // The raw query
      variables, // The raw variables for the query
      response, // The response from apollo
      trace, // per resolver timings
      errors, // output of any errors from the query
    }
    */
  };
};

export default exampleTransport;