Zero Copy
A data-movement optimization that avoids one or more intermediate memory copies by transferring ownership, mapping buffers, or using kernel-assisted I/O paths.
Measurement and Bottleneck Boundary
Zero copy means avoiding selected memory copies; it does not mean data is never moved by hardware, DMA engines, kernels, or network devices.
Related Performance Concepts
Source
- https://docs.kernel.org/networking/iou-zcrx.html