What is a Code Review?

by Tashina

Simply put, a code review, or peer code review, is the act of systematically checking code of peers to point out mistakes. It has been shown to streamline and accelerate the software development process. Though software developers often depend on automated testing for code reviews, manual review of code by peers yields better chances of correction.

Whether one is a programmer or a software development manager, it is imperative to realise the importance of code reviews. When done in a correct manner, peer review saves time by streamlining the development and reducing the amount of work required later by QA teams. Code reviews also save money in the long run by catching bugs that may go undetected during testing and potentially production.

Whereas saving money and time are important concerns for a business in the software development industry, code review also fosters greater communication between coworkers, distributes sense of ownership for a piece of code, and provides invaluable educational context for junior developers. Senior colleagues demonstrate better methods to write clean code and solve problems with useful shortcuts while identifying issues like buffer overflows, memory leaks, and scalability.

Understanding Code Review

A code reviewer reads the code line by line to look for any flaws or potential flaws, quality of comments, consistency with overall program design, and adhering to coding standards.

Code reviews are especially productive for finding security vulnerabilities. There are special applications that aid with the process. It helps with testing the source code systematically for potential trouble such as race condition(s), buffer overflow(s), size violations, memory leakage, and duplicate statements. Code reviews are also important for testing the quality of security patches.

Code review process consist of the following stages:

  • Identifying more efficient ways to complete a task by considering best practices
  • Detecting logical errors
  • Identifying the vulnerabilities in the code
  • Reviewing code to detect any potential malware and to find backdoors integrated into the software

What to Look for in a Code Review

It is important to consider the following points when conducting a code review:


Consider the overall design of the code. Look for answers to questions like do the interactions between different pieces of code make sense? Does the change belong to your library or codebase? Does it integrate with rest of your system? Is it a good time to add a particular functionality?


Is the code serving the purpose for which we created it? Does it cater to all the requirements? Is it user-friendly?


Is the code more complex than it is supposed to be? It is best to check this at every level of the code to see if individual lines are too complex. What about the functions and classes? The term “too complex” usually means that code readers cannot easily understand it.

Aardwolf Security team helps with code reviews to ensure that a business is not exposed to vulnerabilities.

Secure Code Review Quote

If you are looking for a code review quote, Aardwolf security can help fulfil your requirement with one of our experienced developers and testers. Get in touch today to find out more or use our interactive pen test quote form.

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