One type of verse that can be tedious (if there are many like it) is the kind where the first two lines are merely 'meter-rhyme fillers' to set up the line or two that really continue the story.
Verses such as "O the crocus in the early spring
And the aster blooms in the fall,
And my true love was such a ding-a-ling
That he burned down the bleeding hall!"

(OK, that's not a real verse, but I haven't been up long enough to think of an example from a real folk song, though they are there.)

Anyway, that type of verse - as well as the format where you sing the same two-line refrain or 4-line chorus between each two verses - can make a song very long.

Some songs, such as chanteys, involve a lot of repeated lines, because they are designed to make time pass more quickly.   Songs like Down In The Valley, C'est L'Aviron, Sinner Man, etc.
I often sing "condensed" versions, leaving out a lot of the repeated lines.

E.g., in "Sinner Man," instead of singing:
"Run to the sun, "Sun, won't you hide me? .... All on that day.
and
"Lord says, "Sinner Man, sun will be a-freezing," ... All on that day,"

I just sing, "Run to the sun, sun will be a freezing ... All on that day."

I don't even think I originated that shorter version, but that kind of condensed version does work well in settings where the audience expects a song not to go over 3-4 min.