especially for large transforms), but at the expense of several times
longer planning time (especially for large transforms).

</li><li> <a name="index-FFTW_005fEXHAUSTIVE-1"></a>
<code>FFTW_EXHAUSTIVE</code> is like <code>FFTW_PATIENT</code>, but considers an
even wider range of algorithms, including many that we think are
unlikely to be fast, to produce the most optimal plan but with a
substantially increased planning time.

</li><li> <a name="index-FFTW_005fWISDOM_005fONLY"></a>
<code>FFTW_WISDOM_ONLY</c