Save MAT files more quickly

Version (1.84 KB) by Tim Holy
Saves large numeric arrays more quickly than Matlab's built-in save command
Updated 4 Jan 2013

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When working with large arrays, Matlab's 'save' command can be very slow, presumably because Matlab attempts to use compression. This function provides a much faster alternative, at the cost of larger files. It only improves speed for variables that are plain arrays; elements of structures or cell arrays are not altered.

% First make some data
>> ops = struct('algorithm', 'greedy');
>> A = int32(randi(20, 1000, 1200, 40));
>> B = randn(500, 1800, 60);
% Now save it
>> tic; save /tmp/test ops A B; toc
Elapsed time is 22.980294 seconds.
>> tic; savefast /tmp/test ops A B; toc
Elapsed time is 0.571098 seconds.

Happy saving!

Cite As

Tim Holy (2024). Save MAT files more quickly (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2012b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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