See this sage-devel thread for the original posting by Jeroen Demeyer about sage-forker. Here are Jeroen's instructions:
First of all, you need to compile:
$ gcc fsage.c -o fsage
Then, start up the mothersage:
$ sage ---------------------------------------------------------------------- | Sage Version 4.6.1, Release Date: 2011-01-11 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: load "sage-forker.pyx" Compiling ./sage-forker.pyx... sage: sage_forker()
Now open a new terminal and watch the Sage prompt appear without delay:
$ ./fsage ---------------------------------------------------------------------- | Sage Version 4.6.1, Release Date: 2011-01-11 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: