Emjayen

Results 2 issues of Emjayen

As per the title: for performance reasons (single pass & overlapping writes) a version which performs xxh3 and memcpy would be nice to have. Ideally with the option for nt...

PresentMon is reporting seemingly an error of +1 frame for the display latency, as verified against GPUView. [PresentMon trace](https://laserblue.org/dxtest.csv) [GPUView ETL](https://laserblue.org/bad-waitable.zip) [System info](https://laserblue.org/sysinf.zip)