Continuous Integration (CI) is crucial in modern software development for automating code checks and facilitating efficient code reviews, but the duration of CI processes can impact productivity. A study by Graphite revealed that while shorter CI times are generally preferred, a paradox exists where CI times between 15-30 minutes correspond to the highest number of merged pull requests per author. This suggests that these durations may strike a balance between complexity and optimization. The "10-minute golden rule" is often cited as ideal, but data shows that longer CI durations can still be effective, particularly if teams employ strategies like stacking pull requests to maintain velocity. Ultimately, the goal is to find an optimal CI duration that accommodates the complexity of the product while ensuring efficient workflows, with the understanding that reducing CI time can significantly decrease time-to-merge.