Intel NASPT
Intel's NAS Performance Toolkit is an older benchmark that simulates various workloads to gauge theoretical performance. HD Video Playback and Record represents 10 minutes of high-definition MPEG-2 video from a single 1.3GB file alongside an offset 720p recording written sequentially with 256KB access. Office Productivity is a read and write test involving hundreds of small files totalling 2.8GB, Content Creation is primarily a test of random writes, while Photo Album is a largely sequential test of mixed-sized reads.
Whichever way you look at it, the benefit of 2.5GbE is clear to see, and 1GbE frankly is well past its sell-by date.