 longer occurs).
</p>
<p>FFTW 3 also has the new routine <code>fftw_import_system_wisdom</code> to
import wisdom from a standard system-wide location.
</p>
<a name="Memory-allocation"></a>
<h3 class="heading">Memory allocation</h3>

<p>In FFTW 3, we recommend allocating your arrays with <code>fftw_malloc</code>
and deallocating them with <code>fftw_free</code>; this is not required, but
allows optimal performance when SIMD acceleration is used.  (Those two
functions actually existed in FFTW 2, and worked th