- Bison and Flex result in a smaller memory footprint, but you have no graphical IDE.
- antlr uses more memory, but you have antlrworks, a graphical IDE.
Bison/Flex memory usage is typically a mbyte or so. Contrast that with antlr - assuming it uses 512 bytes of memory for every token in the file you want to parse. 4 million tokens and you are out of virtual memory on a 32-bit system.
If the file which you wish to parse is large, antlr may run out of memory, so if you just want to parse a configuration file, it would be a viable solution. Otherwise, if you want to parse a file with lots of data, try Bison.
