Answer by Mike Hansen for Is it equivalent to make test, or to make testlong? Does it have a parallel option?I'm attempting to clarify some of the "how to review patches" parts of the developer guide, and in different places I see different commands for doctesting the entire sage library.

"sage -testall" is equivalent to "make test" -- they both run the script "$SAGE_ROOT/local/bin/sage-maketest". Neither of these run the tests marked "#long". As you guessed, "make testlong" is does run the long tests. It has a parallel version "make ptestlong" where the number of processes are controlled by the NUM_THREADS variable in "makefile". By default, it is set to either 8 or the number of cores on the machine, whichever is smaller. If you'd like to change this, you have to edit the corresponding line in the makefile.