index ca1608811881809227272eb176cb591023a90ee1..15ee7c0f2ba9e2fe46b850a33aeb646549001fd4 100644 (file)
@@ -473,6 +473,13 @@ pgbench <optional> <replaceable>options</replaceable> </optional> <replaceable>d
<para><literal>prepared</literal>: use extended query protocol with prepared statements.</para>
</listitem>
</itemizedlist>
+
+ Because in "prepared" mode <application>pgbench</application> reuses
+ the parse analysis result for the second and subsequent query
+ iteration, <application>pgbench</application> runs faster in the
+ prepared mode than in other modes.
+ </para>
+ <para>
The default is simple query protocol. (See <xref linkend="protocol"/>
for more information.)
</para>