Lecture 377:- Introduction to Delayed Jobs

Delayed jobs are tasks that are executed at a later time instead of immediately. They are useful for performing time-consuming operations such as sending emails or generating reports that could otherwise slow down the user's experience. Delayed jobs are typically managed by a queue, which stores the tasks that need to be executed and processes them in the background.

There are several popular job queue systems available, including Sidekiq, Resque, and DelayedJob. These systems typically work by spinning up a separate process or thread that watches the queue for new jobs, and executes them in the background.

Delayed jobs can be used in a variety of scenarios, including:

• Sending emails: Instead of sending emails immediately when a user submits a form, emails can be queued up and sent later using a delayed job.
• Image processing: Large image files can be processed in the background using a delayed job, so that the user doesn't have to wait for the image to be processed before continuing to use the app.
• Data analysis: Complex data analysis tasks can be offloaded to a delayed job to run in the background, freeing up server resources and improving the user experience.

Overall, delayed jobs are a useful tool for improving the performance and scalability of web applications, and can help developers build more responsive and efficient applications.