## ESP32-P4 fft benchmark:

| Test Name         | Size | SNR (dB) | RMSE   | Time (μs) |
|-----------------------|----------|--------------|------------|---------------|
| 1. test dl fft    | 128      | 104.868538   | 0.000316   | 38            |
|                       | 256      | 107.637619   | 0.000316   | 85            |
|                       | 512      | 110.548630   | 0.000316   | 188           |
|                       | 1024     | 113.582832   | 0.000316   | 415           |
|                       | 2048     | 116.905914   | 0.000316   | 904           |
| 2. test dl ifft   | 128      | 85.701355    | 0.000316   | 46            |
|                       | 256      | 85.375244    | 0.000316   | 99            |
|                       | 512      | 85.372276    | 0.000316   | 217           |
|                       | 1024     | 85.351921    | 0.000316   | 471           |
|                       | 2048     | 85.206238    | 0.000316   | 1017          |
| 3. test dl rfft   | 128      | 101.360046   | 0.000316   | 18            |
|                       | 256      | 105.289742   | 0.000316   | 44            |
|                       | 512      | 107.978775   | 0.000316   | 88            |
|                       | 1024     | 110.488144   | 0.000316   | 212           |
|                       | 2048     | 113.904335   | 0.000316   | 416           |
| 4. test dl irfft  | 128      | 85.467148    | 0.000316   | 22            |
|                       | 256      | 85.928154    | 0.000316   | 52            |
|                       | 512      | 84.540436    | 0.000316   | 102           |
|                       | 1024     | 85.282562    | 0.000316   | 244           |
|                       | 2048     | 85.383667    | 0.000316   | 465           |
| 5. test dl fft s16 | 128      | 65.917183    | 0.001719   | 60            |
|                       | 256      | 61.950771    | 0.003524   | 135           |
|                       | 512      | 59.240242    | 0.006614   | 299           |
|                       | 1024     | 56.814144    | 0.013190   | 654           |
|                       | 2048     | 53.681591    | 0.026223   | 1422          |
| 6. test dl ifft s16 | 128      | 59.837440    | 0.000527   | 61            |
|                       | 256      | 52.158340    | 0.000902   | 137           |
|                       | 512      | 51.414349    | 0.000917   | 303           |
|                       | 1024     | 51.119301    | 0.000960   | 663           |
|                       | 2048     | 45.654255    | 0.001737   | 1439          |
| 7. test dl fft hp s16 | 128      | 76.132126    | 0.000621   | 79            |
|                       | 256      | 73.598412    | 0.000975   | 177           |
|                       | 512      | 72.596603    | 0.001546   | 384           |
|                       | 1024     | 73.045952    | 0.002084   | 853           |
|                       | 2048     | 69.902023    | 0.004387   | 1826          |
| 8. test dl ifft hp s16 | 128      | 72.633217    | 0.000327   | 80            |
|                       | 256      | 71.462891    | 0.000328   | 180           |
|                       | 512      | 68.908401    | 0.000334   | 389           |
|                       | 1024     | 68.920097    | 0.000335   | 862           |
|                       | 2048     | 67.777245    | 0.000345   | 1842          |
| 9. test dl rfft s16 | 128      | 63.782593    | 0.001403   | 32            |
|                       | 256      | 60.652668    | 0.002885   | 70            |
|                       | 512      | 58.204708    | 0.005433   | 154           |
|                       | 1024     | 54.490803    | 0.011284   | 337           |
|                       | 2048     | 51.854618    | 0.022304   | 730           |
| 10. test dl irfft s16 | 128      | 57.822262    | 0.000596   | 32            |
|                       | 256      | 52.207390    | 0.000937   | 71            |
|                       | 512      | 50.153603    | 0.000984   | 155           |
|                       | 1024     | 45.564911    | 0.001740   | 338           |
|                       | 2048     | 40.217754    | 0.003298   | 733           |
| 11. test dl rfft hp s16 | 128      | 75.728333    | 0.000464   | 41            |
|                       | 256      | 74.201035    | 0.000730   | 88            |
|                       | 512      | 72.743904    | 0.001103   | 196           |
|                       | 1024     | 72.959915    | 0.001432   | 422           |
|                       | 2048     | 70.298073    | 0.002952   | 928           |
| 12. test dl irfft hp s16 | 128      | 72.830231    | 0.000324   | 41            |
|                       | 256      | 71.144485    | 0.000330   | 89            |
|                       | 512      | 67.758896    | 0.000338   | 198           |
|                       | 1024     | 69.508110    | 0.000335   | 424           |
|                       | 2048     | 67.428802    | 0.000346   | 933           |