How do I write EBO-friendly classes (empty base optimization) for financial apps?

Empty Base Optimization (EBO) is a technique used in C++ to optimize the memory usage of classes with empty base classes. This is particularly useful in financial applications where performance and memory efficiency are crucial. EBO-friendly classes can lead to significant savings in memory when creating large data structures, such as those used for managing transactions or user data.

In order to write EBO-friendly classes, you should be aware of some best practices. One common approach is to use an empty base class that can be derived from, allowing derived classes to utilize EBO while maintaining a clean interface.

Below is an example of an EBO-friendly class structure suitable for a financial application:

class Base {}; class Transaction : public Base { public: Transaction(int amount) : amount(amount) {} void process() { // Process transaction logic } private: int amount; }; class Account : public Base { public: Account() {} void addTransaction(const Transaction& transaction) { // Logic to add transaction to account } private: std::vector transactions; };

EBO Empty Base Optimization C++ classes financial applications memory optimization

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