Learn Big O by measuring it, in Ruby

📰 Dev.to · Leonid Svyatov

Measure Big O notation in Ruby to identify performance bottlenecks and optimize code for scalability

intermediate Published 20 Jul 2026
Action Steps
  1. Measure the execution time of a Ruby method using the Benchmark module
  2. Use the benchmark results to estimate the Big O complexity of the method
  3. Identify performance bottlenecks in the code by looking for methods with high Big O complexity
  4. Optimize the code by reducing the Big O complexity of the bottleneck methods
  5. Test the optimized code to verify the performance improvements
Who Needs to Know This

Developers and software engineers can benefit from understanding Big O notation to write more efficient code, while DevOps teams can use this knowledge to optimize system performance

Key Insight

💡 Measuring Big O notation can help identify performance bottlenecks in Ruby code and optimize it for scalability

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🚀 Measure Big O in Ruby to optimize performance and scalability!

Key Takeaways

Measure Big O notation in Ruby to identify performance bottlenecks and optimize code for scalability

Full Article

A very common way Ruby code gets slow at scale hides in a line that looks harmless: records.select...
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