SpacingSpanner #'base-shortest-duration doesn't work as expected? Compressing a score horizontally

[Janek Warchoł]

Hi,

I want to compress the score in attachment horizontally, in particular
i want the sixteenth coloraturas to be packed more dense. I added
\context {
        \Score \override SpacingSpanner  #'base-shortest-duration =
#(ly:make-moment 1 4)
}
and nothing happened. Looks like i can only widen the spacing (
#(ly:make-moment 1 32) has an effect on the score).
Is it supposed to work like that?

cheers,
Janek

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