zero_copy_io

⚡️ Zero-Copy with IO.copy_stream

When copying or streaming large files, Ruby’s IO.copy_stream uses OS-level optimizations (like sendfile) to minimize user-space copies. This is significantly faster than manual read/write loops.

# Copy a file
IO.copy_stream('source.bin', 'dest.bin')

# Copy with offset and limit
IO.copy_stream('huge.iso', 'part.iso', 10_000_000, 50_000_000)

This API also works between any objects responding to #read/#write, such as sockets or subprocess pipes.