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<a name="getting-started.in-out-process"></a>Out-of-Process vs In-Process</h2></div></div></div>
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Applets can either live in their own process ("out-of-process") or in the panel process ("in-process"). The decision to choose one or the other is done at build time, with the macro that you use to define the applet factory: <a class="link" href="panel-applet-Panel-Applet-Factory.html#PANEL-APPLET-OUT-PROCESS-FACTORY:CAPS" title="PANEL_APPLET_OUT_PROCESS_FACTORY()"><code class="function">PANEL_APPLET_OUT_PROCESS_FACTORY()</code></a> is used for out-of-process applets while <a class="link" href="panel-applet-Panel-Applet-Factory.html#PANEL-APPLET-IN-PROCESS-FACTORY:CAPS" title="PANEL_APPLET_IN_PROCESS_FACTORY()"><code class="function">PANEL_APPLET_IN_PROCESS_FACTORY()</code></a> is used for in-process applets. Obviously, only one of those two macros can be used.
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For most practical matters, from the applet perspective, the two options are the same. In-process applets do offer a slightly better performance when the applet is loaded, but this should not affect much the user experience. However, an in-process applet can potentially affect the whole behavior of the panel, especially in case of crashes or memory corruptions: a crash in an in-process applet will crash the whole panel. It is therefore recommended to use out-of-process applets.
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