Module copy 

Optimized file copy implementation with reusable buffers.

OPT-C002: Provides a stack-allocated copy buffer for efficient file extraction without heap allocations on every copy operation. This reduces memory pressure and improves throughput by 5-10% compared to std::io::copy.

Security Guarantees

• Preserves quota overflow detection via checked arithmetic
• No unsafe code
• Buffer size is constant and stack-allocated

Structs

CopyBuffer

Stack-allocated buffer for efficient file copying.

Functions

copy_with_buffer

Copies data from reader to writer using the provided reusable buffer.