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Executing a long running task like external API requests in the request-response cycle is guaranteed to bring your Rails app to its knees sooner or later. We have relied on background jobs to offload long running tasks due to this. But it doesn't always have to be. Learn how you can leverage Falcon and the Async gem to unlock the full potential of ruby fibers and eliminate background jobs for IO-bound tasks and execute them directly with clean, simple, performant and scalable code.
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The video titled "Look Ma, No Background Jobs: A Peek into the Async Future" presented by Manu J at RailsConf 2024 delves into the challenges of executing long-running tasks, particularly when making external API requests within the request-response cycle of a Rails application. The speaker emphasizes that relying on background jobs has been a common solution to mitigate the potential strain on applications caused by these tasks. However, Manu J proposes an alternative approach that utilizes the features of Ruby fibers alongside the Async gem, specifically focusing on how developers can streamline their code and improve performance without the need for background jobs. ### Key Points Discussed: - **Challenges of Background Jobs**: The video opens by discussing the limitations and overhead associated with background jobs in Rails applications, which can lead to performance bottlenecks. - **Introduction to Async**: Manu introduces the Async gem as a powerful tool for managing IO-bound tasks directly in a synchronous manner without sacrificing performance, allowing more straightforward integration within code. - **Leveraging Falcon**: Falcon, a web server that supports long-running connections, is highlighted as an effective means to elevate the performance of Ruby applications. This server combined with the Async gem allows for a unique handling of parallel tasks without involving external job processing systems. - **Ruby Fibers**: The speaker elaborates on Ruby fibers as a way to achieve concurrency within a single thread, thus simplifying the handling of asynchronous tasks without the overhead commonly associated with multi-threading. - **Improved Structure and Maintenance**: By shifting to this model of handling tasks, developers are encouraged to write cleaner, more maintainable code, which can easily scale with the application’s needs. - **Real-World Case Studies**: Although the transcript lacks detailed case studies, the presentation likely integrates scenarios where this approach yielded significant improvements in application responsiveness and resource utilization. ### Conclusions and Takeaways: The video wraps up with a persuasive argument that by embracing these new technologies and methodologies, Rails developers can not only increase the efficiency of their applications but also reduce the complexity associated with managing background jobs. Manu encourages the audience to consider adopting this async paradigm to fully utilize Ruby's capabilities while fostering clean and modern code development practices. This discussion reinforces the idea that the future of Rails development may well lean more heavily on asynchronous approaches rather than traditional background processes.
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