Python vs. C++ vs. Swift: Performance Comparison of Find Duplicate Algorithm

There could be several reasons why the first Python code may be faster than the second C++ and third Swift code:

1. Compiler optimization: Python is an interpreted language, so it may not have as many compiler optimizations as C++ or Swift. The C++ and Swift compilers may optimize the code more effectively, resulting in faster execution.

2. Data structures and memory management: Python may use different data structures or memory management techniques that are more efficient for the given problem. This can significantly impact the runtime of the code.

3. Hardware differences: The performance of the code can also be influenced by the specific hardware and system architecture on which it is running. Different programming languages may interact differently with the hardware, resulting in varying performance.

4. Implementation details: The specific implementation of the algorithm in each language can also have an impact on performance. Small differences in code structure or logic can affect how efficiently the algorithm runs.

It's important to note that the relative performance of different programming languages can vary depending on the specific problem and the characteristics of the input data. It's not always the case that one language will consistently outperform another in every situation.