GraphQL::Flamegraph

Collects data for visualizing performance of your GraphQL request resolving for applications built with GraphQL-Ruby.

Installation

1. Add this line to your application's Gemfile:

   gem 'graphql-flamegraph'

   And then execute:

   $ bundle install

2. Plug it into your GraphQL schema:

   class YourAppSchema < GraphQL::Schema
     use GraphQL::Flamegraph, path: Rails.root.join("tmp")
   end

Usage

To generate flamegraph for some query, set flamegraph option to true in your context.

result = YourAppSchema.execute(
  query: "query { products { id title quantity … } }",
  context: { flamegraph: true },
  variables: {},
)

Path to the generated file will be printed to standard output like this:

Check your flamegraph at /tmp/graphql-flamegraph-20200320-90923-px3494.txt
Open it in https://www.speedscope.app/ or in local speedscope:

    speedscope /tmp/graphql-flamegraph-20200320-90923-px3494.txt

Also you will be able to access collected data via result.context[:flamegraph].to_s

You can view it with your favorite flamegraph visualizer.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/Envek/graphql-flamegraph.

License

The gem is available as open source under the terms of the MIT License.