On i7 4790k and a 280X, there is a boost of about 10% more FPS.
Nominated by John Ettedgui.
<application name="Outlast" executable="OLGame.x86_64">
<option name="mesa_glthread" value="true"/>
</application>
+ <application name="Spec Ops: The Line (32-bit)" executable="specops.i386">
+ <option name="mesa_glthread" value="true"/>
+ </application>
+ <application name="Spec Ops: The Line (64-bit)" executable="specops">
+ <option name="mesa_glthread" value="true"/>
+ </application>
</device>
<!-- vmwgfx doesn't like full buffer swaps and can't sync to vertical retraces.-->
<device driver="vmwgfx">