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cooley-tukey-fft

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Permutation-free mixed-radix FFT library in C with hand-tuned AVX2/AVX-512 codelets for 18 radixes, zero-allocation in-place execution, and a calibrated wisdom planner. Beats Intel MKL on 207/207 cells (median 2.36×) and FFTW3 on 202/207 (median 3.21×). Pure C, no runtime dependencies.

  • Updated May 17, 2026
  • C

GPU-accelerated Fast Fourier Transform implementation using CUDA. Demonstrates Cooley-Tukey radix-2 algorithm with shared memory optimization, achieving 534x speedup over CPU and 1.74x over NumPy for large transforms. Developed on Tesla P100.

  • Updated Jan 3, 2026
  • Python

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