Python, C++, and Swift: Performance Comparison of Finding Duplicates in an Array

There could be several reasons why the first Python code is faster than the C++ and Swift code:\n\n1. Compiler optimizations: The C++ and Swift code may not have been optimized by the compiler, resulting in slower execution.\n\n2. Language differences: Python is an interpreted language, while C++ and Swift are compiled languages. Interpreted languages may have different performance characteristics compared to compiled languages.\n\n3. Implementation details: The specific implementation of the algorithm in each language may differ, leading to variations in performance.\n\n4. Hardware differences: The code may be running on different hardware, which can also impact the execution speed.\n\nIt's important to note that performance can vary greatly depending on the specific code, compiler optimizations, and hardware being used.