Challenge to calculate the dot product of two matrices as fast as possible

Uses four different methods and times each one.

• Single-Threaded using CPU
• Single-Threaded using SSE 4.2
• Multi-Threaded using CPU
• Multi-Threaded using SSE 4.2

This shows examples of using:

• malloc to allocate memory from the heap
• pthreads for multi-threaded applications in Linux
• Streaming SIMD Extensions (SSE 4.2)
• rdtsc to time and profile different functions / algorithms