## ESP32-C5 fft benchmark:

| Test Name         | Size | SNR (dB) | RMSE   | Time (μs) | Test Time (ms) |
|-----------------------|----------|--------------|------------|---------------|--------------------|
| 1. test dl fft    | 128      | 105          | 0.000316   | 1220          | 703                |
|                       | 256      | 108          | 0.000316   | 2801          |                    |
|                       | 512      | 111          | 0.000316   | 6323          |                    |
|                       | 1024     | 114          | 0.000316   | 14083         |                    |
|                       | 2048     | 117          | 0.000316   | 31060         |                    |
| 2. test dl ifft   | 128      | 85.7         | 0.000316   | 1278          | 772                |
|                       | 256      | 85.4         | 0.000316   | 2919          |                    |
|                       | 512      | 85.4         | 0.000316   | 6548          |                    |
|                       | 1024     | 85.4         | 0.000316   | 14537         |                    |
|                       | 2048     | 85.2         | 0.000316   | 31963         |                    |
| 3. test dl rfft   | 128      | 101          | 0.000316   | 621           | 449                |
|                       | 256      | 105          | 0.000316   | 1534          |                    |
|                       | 512      | 108          | 0.000316   | 3119          |                    |
|                       | 1024     | 110          | 0.000316   | 7577          |                    |
|                       | 2048     | 114          | 0.000316   | 15088         |                    |
| 4. test dl irfft  | 128      | 85.5         | 0.000316   | 668           | 491                |
|                       | 256      | 85.9         | 0.000316   | 1630          |                    |
|                       | 512      | 84.5         | 0.000316   | 3305          |                    |
|                       | 1024     | 85.3         | 0.000316   | 7948          |                    |
|                       | 2048     | 85.4         | 0.000316   | 15804         |                    |
| 5. test dl fft s16 | 128      | 65.9         | 0.001719   | 87            | 139                |
|                       | 256      | 62.0         | 0.003524   | 194           |                    |
|                       | 512      | 59.2         | 0.006614   | 429           |                    |
|                       | 1024     | 56.8         | 0.013190   | 938           |                    |
|                       | 2048     | 53.7         | 0.026223   | 2038          |                    |
| 6. test dl ifft s16 | 128      | 59.8         | 0.000527   | 89            | 143                |
|                       | 256      | 52.2         | 0.000902   | 198           |                    |
|                       | 512      | 51.4         | 0.000917   | 435           |                    |
|                       | 1024     | 51.1         | 0.000960   | 951           |                    |
|                       | 2048     | 45.7         | 0.001737   | 2063          |                    |
| 7. test dl fft hp s16 | 128      | 76.1         | 0.000621   | 111           | 149                |
|                       | 256      | 73.6         | 0.000975   | 248           |                    |
|                       | 512      | 72.6         | 0.001546   | 537           |                    |
|                       | 1024     | 73.0         | 0.002084   | 1188          |                    |
|                       | 2048     | 69.9         | 0.004387   | 2545          |                    |
| 8. test dl ifft hp s16 | 128      | 72.6         | 0.000327   | 112           | 158                |
|                       | 256      | 71.5         | 0.000328   | 251           |                    |
|                       | 512      | 68.9         | 0.000334   | 542           |                    |
|                       | 1024     | 68.9         | 0.000335   | 1199          |                    |
|                       | 2048     | 67.8         | 0.000345   | 2566          |                    |
| 9. test dl rfft s16 | 128      | 63.8         | 0.001403   | 45            | 130                |
|                       | 256      | 60.7         | 0.002885   | 99            |                    |
|                       | 512      | 58.2         | 0.005433   | 218           |                    |
|                       | 1024     | 54.5         | 0.011284   | 477           |                    |
|                       | 2048     | 51.9         | 0.022304   | 1034          |                    |
| 10. test dl irfft s16 | 128      | 57.8         | 0.000596   | 45            | 134                |
|                       | 256      | 52.2         | 0.000937   | 100           |                    |
|                       | 512      | 50.2         | 0.000984   | 220           |                    |
|                       | 1024     | 45.6         | 0.001740   | 480           |                    |
|                       | 2048     | 40.2         | 0.003298   | 1041          |                    |
| 11. test dl rfft hp s16 | 128      | 75.7         | 0.000464   | 57            | 135                |
|                       | 256      | 74.2         | 0.000730   | 123           |                    |
|                       | 512      | 72.7         | 0.001103   | 272           |                    |
|                       | 1024     | 73.0         | 0.001432   | 585           |                    |
|                       | 2048     | 70.3         | 0.002952   | 1284          |                    |
| 12. test dl irfft hp s16 | 128      | 72.8         | 0.000324   | 58            | 139                |
|                       | 256      | 71.1         | 0.000330   | 123           |                    |
|                       | 512      | 67.8         | 0.000338   | 273           |                    |
|                       | 1024     | 69.5         | 0.000335   | 587           |                    |
|                       | 2048     | 67.4         | 0.000346   | 1289          |                    |