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-rw-r--r--tests/perf_bench/bm_fft.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/perf_bench/bm_fft.py b/tests/perf_bench/bm_fft.py
index fb79a9fd28..9a2d03d11b 100644
--- a/tests/perf_bench/bm_fft.py
+++ b/tests/perf_bench/bm_fft.py
@@ -15,7 +15,7 @@ def transform_radix2(vector, inverse):
# Initialization
n = len(vector)
- levels = int(math.log2(n))
+ levels = int(math.log(n) / math.log(2))
coef = (2 if inverse else -2) * cmath.pi / n
exptable = [cmath.rect(1, i * coef) for i in range(n // 2)]
vector = [vector[reverse(i, levels)] for i in range(n)] # Copy with bit-reversed permutation