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Convert video to MATLAB image sequence

I am trying to convert a video into a sequence of images, and in mathworks I saw code like this

Read and play the xylophone.mp4 movie file.

xyloObj = VideoReader('xylophone.mp4');

nFrames = xyloObj.NumberOfFrames;
vidHeight = xyloObj.Height;
vidWidth = xyloObj.Width;

Pre-select the film structure.

mov(1:nFrames) = ...
    struct('cdata',zeros(vidHeight,vidWidth, 3,'uint8'),...
           'colormap',[]);

Read one frame at a time.

for k = 1 : nFrames
    mov(k).cdata = read(xyloObj,k);
end

while I try to use this code, it takes a very long time to compile it. Is there a way to read all frames without a loop so that I can do it faster?

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video = read(xyloObj, [1 10]);

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frame = video(:,:,:,i);

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video = read(xyloObj);

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for idx = 1 : 20 : nFrames
    if idx + 20 > nFrames
        endIndex = nFrames;
    else
        endIndex = idx + 20;
    end
    video = read(xyloObj, [idx endIndex-1]);

    %// Continue processing
end

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