FPGAs are usually very good at accelerating one computing algorithm at a time. Not two. Just one. They'll beat processors unless the operations are an obvious f

FPGAs are usually very good at accelerating one computing algorithm at a time. Not two. Just one. They'll beat processors unless the operations are an obvious fit for processors (for instance, floating point). I/O is actually a bottleneck in FPGAs. In practice, most applications require executing plenty of algorithms one after the other, depending on input data, with a lot of glue in between (I/O). FPGAs are terrible at that.