From 77090370952307730ea71d68b848cce0dc8cbd83 Mon Sep 17 00:00:00 2001 From: Raymond Hettinger Date: Mon, 3 Jul 2023 15:38:38 -0500 Subject: Small speed-up for the convolve() recipe. (GH-106371) --- Doc/library/itertools.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index 56d6599..a2d1798 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -1085,8 +1085,8 @@ The following recipes have a more mathematical flavor: kernel = tuple(kernel)[::-1] n = len(kernel) padded_signal = chain(repeat(0, n-1), signal, repeat(0, n-1)) - for window in sliding_window(padded_signal, n): - yield math.sumprod(kernel, window) + windowed_signal = sliding_window(padded_signal, n) + return map(math.sumprod, repeat(kernel), windowed_signal) def polynomial_from_roots(roots): """Compute a polynomial's coefficients from its roots. -- cgit v0.12