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dit-fft

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Tugbars / VectorFFT

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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.

simd fft vectorization cooley-tukey-fft bluestein fourier-transform fft-library bluestein-fft butterfly-operation cooley-tukey mixed-radix rader-fft dit-fft dag-optimization
  • Updated May 17, 2026
  • C

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