Nulgrind is the simplest possible Valgrind tool. It performs no
instrumentation or analysis of a program, just runs it normally. It is
mainly of use for Valgrind's developers for debugging and regression
testing.
Nonetheless you can run programs with Nulgrind. They will run
roughly 5 times more slowly than normal, for no useful effect. Note
that you need to use the option --tool=none
to run
Nulgrind (ie. not --tool=nulgrind
).