Totally disagree. Moving memory to the GPU can be parallelized while doing the computation. For larger files that can fully saturate the gpu's bandwidth, it's c

Totally disagree. Moving memory to the GPU can be parallelized while doing the computation. For larger files that can fully saturate the gpu's bandwidth, it's completely negligible. "Easily the most time consuming part", no. Not even close. Also, IO bound? Again, no. My consumer MBP can read at 3.2GB/s. Good luck doing regex on that in real time on a CPU. This is a CPU bound operation for a typical high end configuration. Does this make sense for a 1MB file? probably not. But anything well beyond that it will be way faster. Here's a great talk about how you should think about GPU performance: https://www.nvidia.com/content/GTC-2010/pdfs/2238_GTC2010.pdf https://www.nvidia.com/content/GTC-2010/pdfs/2238_GTC2010.pd...