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Fast I/O Library for C++

This library provides a highly optimized alternative to the standard I/O operations (cin, cout, scanf(), printf()) in C++. By significantly reducing the overhead associated with these operations, fistream and fostream classes can perform input and output operations up to 10 times faster, making it particularly useful for performance-critical applications such as competitive programming, large data processing, and more.

Features

  • Enhanced Performance: Achieve faster I/O by minimizing internal operation overhead.
  • Ease of Use: Implements standard C++ stream operators, making it easy to integrate and replace existing code with minimal changes.
  • Extended Compatibility: Supports all fundamental data types and offers precision control for floating-point numbers.

Usage

#include "fiostream_x86/64.h" in your C++ project and replace cin and cout, with fin and fout.

#include "fiostream_x86.h"

int main()
{
    int a, b;
    fin >> a >> b; // Reading integers using fistream
    fout << "Sum is: " << (a + b) << fendl; // Writing output using fostream
    return 0;
}

Input

int x;
double y;
fin >> x >> y; // Read an integer and a double

Output

int num = 42;
fout << "Number: " << num << fendl;

long double pi = acosl(-1);
fout << "Pi: " << fsetprecision(20) << pi << fendl;

Caution

Don't use fin and fout inconsistently with cin, cout, scanf() or printf() because it can be a cause of potential errors.

Contributing

Contributions to improve this library are welcome. Please send pull requests or open an issue if you find bugs or have suggestions.

License

This project is licensed under the MIT License - see the LICENSE file for details.