[ArturT]

Sidekiq Pro version was inspiration for me to create a pro version for my Ruby gem called knapsack that automatically splits tests in parallel on CI nodes/jobs.

With the knapsack_pro version I focused on common needs of users and there was simple validation method to verify if particular feature was needed. People just pay if it brings value.

In case of free open source tool, people tend to want something but you don't know if they actually will you use it and sometimes people demand a thing while you have to put the hard work.

When you do paid version of your tool then somehow people are polite. :)

Nowadays I have also support for running parallel tests in JS.

More at https://knapsackpro.com and here is detailed technical explanation how it works https://docs.knapsackpro.com/2020/how-to-speed-up-ruby-and-j...