| Implementation | method | Support for time-out/efficient waiting
|
| SBCL | Yes (BSD sockets) | Yes, select()
|
| CLISP | Yes, through raw sockets | SOCKET:SOCKET-STATUS works for raw sockets
|
| CMUCL | Yes (unix module; BSD socket API) | Yes, select()
|
| Scieneer | Probably (stems from CMU) | Yes, probably select()
|
| Allegro | Yes | Yes, mp:wait-for-input-available [input only :-( ]
|
| OpenMCL | Yes (Same API as Allegro) | No (or select and FFI)
|
| LispWorks | LispWorks-UDP? (non-official) | To be investigated
|
| ECL | Yes (BSD sockets) | Yes, BSD sockets through clines
|
| ArmedBear | Yes, same way as stream and server sockets: with 'FFI' | Yes, through Selectors, Channels etc
|
