Why might the compiler choose not to inline a function even if the inline keyword is used?

  • Available memory
  • Compiler optimization settings
  • Compiler version
  • Function complexity
The compiler may choose not to inline a function if it's too complex, as inlining large functions can lead to increased code size and reduced performance. Other factors such as optimization settings, memory constraints, and compiler versions also play a role in the decision. The 'inline' keyword is a hint to the compiler, and it may still choose not to inline based on these factors.
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