Problem 42793. Fast 1-D Convolution (full shape)

Created by Peng Liu

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This is the first problem in the fast 1-D convolution series. This problem asks you to find a fast algorithm to compute the 1-D convolution in its full output shape.

There exists a fast 1-D convolution algorithm way more efficient than MATLAB's built-in conv function invoked in the form conv(u,v,'full'), and the performance improvement is more pronounced when length(u) and/or length(v) are large. Do you know how? Try it out.

Next problem: Fast 1-D Convolution (same shape).

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68 Solutions
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Last Solution submitted on Dec 09, 2025

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3 Comments

li haitao on 16 Nov 2018

The same codes, the score is from 5 to 49, too wide.

li haitao on 16 Nov 2018

score.p is invalid now, the score is size, not speed.

Rafael S.T. Vieira on 21 Aug 2020

The function conv is not slow. It is like complaining that the function sum is slow. And the only way the function sum can be slow is if we are not using it properly.

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Problem 42793. Fast 1-D Convolution (full shape)

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Last 200 Solutions

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Problem Recent Solvers34

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Problem 42793. Fast 1-D Convolution (full shape)

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers34

Suggested Problems

More from this Author28

Problem Tags

Community Treasure Hunt

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