8. Need for Speed – Performance and Optimization

Learning Objectives

By the end of this chapter, you will be able to:

  • Time your code performance manually
  • Use source code instrumentation to measure code execution time
  • Use the perf tool to analyze program performance
  • Use the godbolt compiler explorer tool to analyze machine code generated by a compiler
  • Use compiler flags to generate better code
  • Apply code idioms that result in performance
  • Write cache-friendly code
  • Apply algorithm-level optimizations to real-world problems

In this chapter, we will explore concepts that will allow us to write fast code in general and several practical techniques that apply to C++ in particular.


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