In software development, code review plays a significant role in helping detect issues in your application’s source code early and promote collaboration among your team members. Breaking down code reviews into more manageable portions can yield great benefits. Review cycles are shorter and more convenient to comprehend when they are smaller. In other words, smaller reviews are easier to comprehend and provide feedback cycles. As a result, we can reduce development, deployment and debugging times while reducing the scope of change in each iteration.
This article presents a discussion on code reviews, why they are important, their benefits and why smaller code review cycles are more effective than larger ones.
What is Code Review?
Code review is defined as a software development process which involves reviewing code written by other developers. As part of the development process, it aims to improve code quality, ensure compliance with standards and identify and fix problems early on. Code reviews play a role in software development as they help catch errors before they turn into significant issues.
Peer reviews allow developers to detect errors or defects in each other’s code. By reviewing each other’s code, developers are able to identify bugs and flaws in the code. It helps deliver code that is secure and sustainable, adheres to standards and detects and resolves problems early in the development life cycle.
This can either be a formal process, where code is systematically evaluated according to a checklist or set of guidelines, or an informal process, where code is reviewed ad hoc. Code review can be performed by the same developers working on the code or by other developers with expertise in the relevant domain or technology.
By engaging in the exchange of feedback and actively participating in code reviews, we can ensure that the code is well-organized, easy to comprehend, adapt and extend over time. To be effective, it’s essential that everyone on the team is on the same page when it comes to their expectations and goals regarding these reviews.
Here are the key benefits of code review at a glance:
- Identify bugs and issues
- Improve code quality, consistency and maintainability
- Enforce coding standards
- Foster team collaboration
- Promote knowledge sharing
Best Practices of Code Review
Here are some of the best practices you should follow to improve your code review process:
- Review small units of code
- Set clear objectives and guidelines
- Involve multiple reviewers
- Provide constructive and respectful feedback
- Use code review tools
- Prioritize high-risk areas
- Balance attention to detail with time efficiency
- Encourage collaboration and learning
- Set realistic deadlines
- Follow up and close the loop
Automating the Code Review Process
Automated code reviews can help you enhance collaboration amongst your team and reduce the time spent in each cycle. Your developers can improve code quality and maximize productivity by automating the development workflow.
Here are the key benefits of automating the code review process:
- Enhances code quality
- Improves productivity
- Enhances code quality
- Improves collaboration
- Fosters learning opportunities
The Problem With Large Code Reviews
The traditional approach to code review often involves reviewing large chunks of code in a single session. Although this approach is initially efficient, it can lead to multiple problems. You will need more effort and spend more time reviewing large chunks of code. If code reviews are extensive and take longer to complete, it can often result in decreased attention to detail. Due to this, the likelihood of missing crucial errors and reviewer fatigue will increase, resulting in delays in feedback and completing the code review process.
The Benefits of Smaller Code Reviews
When the code review cycle is small, it becomes easier to track deployment changes easily. Smaller code reviews continuously improve development, deployment and debugging times and reduce the radius of a change set. As a result, it promotes faster deployment and helps identify issues easily and early in the software development life cycle.
Once a code review cycle is complete, the code goes through many steps before it finally reaches the production phase. Monitoring the application’s performance and detecting bugs (if any) is much easier when you make only minimal changes to your code. When the changes are small, it is easier to track the application’s behavior and detect bugs.
Here are some benefits of adopting smaller code reviews:
Focused Review
Reviewing smaller chunks of code enables you to analyze the code in a more focused and in-depth manner. This helps reviewers focus on specific functionality or components, leading to more accurate feedback.
Reduced Cognitive Load
Limiting the amount of code to review reduces cognitive overload for both developers and reviewers. Smaller code review cycles can be more efficient because they break down the review process into more manageable chunks. As a result, you’ll be able to evaluate code quality in a much more effective and efficient manner and identify potential issues or improvements more easily.
Faster Feedback Loop
Smaller code reviews can significantly speed up the feedback loop in the development process. Hence, feedback cycles will be faster, i.e., you will be able to receive feedback faster, resulting in quicker iterations and faster software delivery. The smaller the review, the easier it is to digest and the faster the feedback cycle.
Enhanced Collaboration
Smaller code reviews allow for more focused discussions and collaboration between reviewers and developers. Most importantly, since you can handle concerns effectively and efficiently, you can engage in more productive discussions. The efficiency and effectiveness of code reviews improves when the expectations of all stakeholders are aligned.
Measuring Success
To measure the success of smaller code reviews, consider the metrics and approaches given below:
Defect Detection Rate
This is a measure of the number of defects or issues identified during a code review cycle relative to the number of defects found later in testing or in the production environment. Note that a higher defect detection rate indicates you’re able to detect defects effectively.
Review Efficiency
Calculate the time it takes to review a chunk of code to understand the pace and efficiency of the code review process.
Feedback Quality
Assess the quality of the feedback provided during reviews, such as checking if the feedback is constructive, clear and actionable. Note that if the feedback is of high quality, it would typically yield better code improvements and learning opportunities for your team.
Cycle Time
The duration of the code review process is an indicator of efficiency. A shorter cycle time suggests an efficient review process, but quality should not be compromised.
Automated Checks Integration
Evaluate how effectively automated tools are integrated into the code review process to detect common issues and reduce the manual effort required in reviews.
Knowledge Sharing
Assess how well the code review process facilitates knowledge sharing and cross-team learning. This can be observed through the diversity of reviewers and the nature of the discussions in the review process.
Bug Rates Post-Release
Monitor the incidence of bugs or issues in the code post-release. A decrease in this rate can indicate that the code review process is effectively catching and addressing potential problems before release.
Conclusion
Code review helps produce code that is highly performant, scalable, secure and compliant with the recommended standards. Code reviews can make the codebase easily understood, flexible and scalable. A collaborative approach to code review can yield several benefits, such as promoting a culture of continuous development and learning, maintaining an organized codebase with clean code and clear structure, helping detect and resolve issues quickly, etc.
