Unclear, first they mention:

- 68.37% of CPU was spent computing these checksums. With a one-line code change to enable hardware-acceleration on Graviton via the sha2 library, this went down to 31.82%. This improvement allows us to push at least 2x more throughput from these processes without increasing our compute spend.” - Shikhar, CEO of S2

But later they say:

- Checksum Processing Efficiency: The AWS S3 Rust SDK was found to be unnecessarily recomputing CRC32C checksums. Identifying this issue led to the implementation of a simple workaround, further improving efficiency.

Thank you for the feedback! Quickly worked with the S2 team to get the screenshot from the change added (it's just enabling the hardware acceleration feature in the sha2 crate)!