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<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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<chapter id="nl-manual" xreflabel="Nulgrind">
<title>Nulgrind: the "null" tool</title>
<subtitle>A tool that does not very much at all</subtitle>
<para>Nulgrind is the minimal tool for Valgrind. It does no
initialisation or finalisation, and adds no instrumentation to
the program's code. It is mainly of use for Valgrind's
developers for debugging and regression testing.</para>
<para>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 <option>--tool=none</option> to run
Nulgrind (ie. not <option>--tool=nulgrind</option>).</para>
</chapter>