ExecJS::PCRuntime

Accelerated ExecJS Runtime by launching Node.js Processes per Context, not per execution.

inspired by execjs-fastnode

How PCRuntime fast?

The existing Node.js runtime spawns a Node.js process for each eval, regardless of whether it compiles or not. To reduce this overhead, execjs-fastnode is designed to launch a single Node.js process and manage the Context in JavaScript.

Node.js execjs-fastnode
Sequence Diagram of Node.js Runtime Sequence Diagram of FastNode Runtime

execjs-fastnode is designed to limit the number of threads that can access a Node.js process to 1 to avoid the race condition when multiple Contexts are used. execjs-pcruntime works lock-free by creating a Node.js process for each Context. This improves performance when used with multi-threading.

execjs-fastnode(multi-threading) execjs-pcruntime
Sequence Diagram of FastNode Runtime in multi-threading Sequence Diagram of PCRuntime

Requirements

  • Ruby >= 3.0.0
  • execjs ~> 2.0

Installation

Add this line to your application's Gemfile:

gem 'execjs-pcruntime'

And then execute:

bundle

Usage

Once installed, the Runtime will automatically be replaced. If you want to set it, you can use environment variable EXECJS_RUNTIME=PCRuntime.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test 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.

Test

To run a unit test, run the following command.

bundle exec rake

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/heyinc/execjs-pcruntime. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

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

Code of Conduct

Everyone interacting in the Execjs::Pcruntime project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.