This content originally appeared on DEV Community and was authored by Abdullah
Ever stared at a function with a Cyclomatic Complexity (CC) > 50? You’re not alone, and it was a nightmare! This wasn’t just a number; it was a sprawling, untestable, and bug-ridden monster lurking I came across recently.
What is Cyclomatic Complexity? It’s a metric that tells you the number of independent paths through your code. Essentially, how many different ways your code can execute.
- CC 1-10: Great! Simple, clear, easy to test.
- CC 11-20: Moderate. Still manageable, but be mindful.
- CC 21-50: High. Difficult to read, test or maintain. Needs to be refactored as soon as possible.
- CC > 50: Danger zone! A sign of deeply entangled logic.
Here’s how CC increases:
-
if/elsestatements: Each adds a path. -
for/whileloops: Each adds a path. -
switchcases: Each case adds a path. - Logical operators (
&&,||): Each condition adds to complexity.
Why does high CC matter?
- Debugging hell: More paths mean more places for bugs to hide.
- Testing nightmare: Covering all scenarios becomes nearly impossible.
- Maintenance dread: Understanding and modifying the code is a Herculean task.
Tools like CodeMetrics (available in VS Code, it shouldn’t be difficult to find similar extensions for Visual Studio or other tools as well) are game-changers. They proactively flag complex code, letting you refactor before it spirals out of control.
Don’t let complexity turn your codebase into a nightmare. Embrace static analysis tools and prioritize refactoring for cleaner, more maintainable code!
This content originally appeared on DEV Community and was authored by Abdullah