Mercurial > hg > js-dsp-test

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    <title>Javascript FFT speed test</title>

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    <script src="nayuki/fft.js"></script>
    <script src="nayuki-obj/fft.js"></script>
    <script src="fft.js/lib/complex.js"></script>
    <script src="jsfft/lib/complex_array.js"></script>
    <script src="jsfft/lib/fft.js"></script>
    <script src="cross/Cross.js"></script>
    <script src="cross/FFT.js"></script>
    <script src="kissfft/KissFFT.js"></script>
    <script src="kissfft/FFT.js"></script>
    <script src="fftw/FFTW.js"></script>
    <script src="fftw/FFT.js"></script>
    <script src="test.js"></script>

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  <h3>Forward real-complex FFT speed test</h3>

  <p id="test-description"></p>

  <table>
    <tr>
      <th>Implementation</th><th>Result</th><th>Time (first half)</th><th>Time (second half)</th><th>Rate (second half)</th>
    </tr>
    <tr>
      <td>Nayuki</td><td id="nayuki-result"></td><td id="nayuki-1"></td><td id="nayuki-2"></td><td id="nayuki-itr"></td>
    </tr><tr>
      <td>Nayuki (obj)</td><td id="nayukiobj-result"></td><td id="nayukiobj-1"></td><td id="nayukiobj-2"></td><td id="nayukiobj-itr"></td>
    </tr><tr>
      <td>KissFFT</td><td id="kissfft-result"></td><td id="kissfft-1"></td><td id="kissfft-2"></td><td id="kissfft-itr"></td>
    </tr><tr>
      <td>Cross</td><td id="cross-result"></td><td id="cross-1"></td><td id="cross-2"></td><td id="cross-itr"></td>
    </tr><tr>
      <td>FFTW</td><td id="fftw-result"></td><td id="fftw-1"></td><td id="fftw-2"></td><td id="fftw-itr"></td>
    </tr><tr>
      <td>Nockert</td><td id="nockert-result"></td><td id="nockert-1"></td><td id="nockert-2"></td><td id="nockert-itr"></td>
    </tr><tr>
      <td>Dntj</td><td id="dntj-result"></td><td id="dntj-1"></td><td id="dntj-2"></td><td id="dntj-itr"></td>
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  <h3>Notes</h3>

  <ul>
    <li><b>Nayuki</b>: in-place single-precision complex-complex. Around 7kb.</li>
    <li><b>Nayuki (obj)</b>: Nayuki with the sin/cos tables pre-calculated on object construction. Around 4kb.</li>
    <li><b>Nockert</b>: double-precision real-complex. Around 25kb.</li>
    <li><b>Dntj</b>: double-precision complex-complex. Forward
    transform is scaled and I've scaled it back again here, which may
    introduce rounding error. Around 10kb.</li>
    <li><b>Cross</b>: double-precision real-complex in C, compiled
    with Emscripten. This is considered a slow implementation amongst
    native code ones. Around 60kb.</li>
    <li><b>KissFFT</b>: single-precision real-complex in C, compiled
    with Emscripten. A reasonably sophisticated implementation. Around
    70kb.</li>
    <li><b>FFTW</b>: single-precision real-complex in C, compiled with
    Emscripten. GPL licensed. Around 3Mb.</li>
  </ul>

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author	Chris Cannam
date	Sat, 17 Oct 2015 15:00:08 +0100
parents	9af60df83c6f
children	ebc87a62321d afbb64027d79