The other comment mentions computed Goto's. I have used those with big success when writing streaming parsers that work per-char (like a typical JSON or csv-par

The other comment mentions computed Goto's. I have used those with big success when writing streaming parsers that work per-char (like a typical JSON or csv-parser). I can't remember exactly, but I think switching from a switch statement to computed gotos cut something like 10% from execution time due to better branch predictions in the CPU. That is pretty huge, considering it was a pretty small change to the char dispatch.