He does anything at at a snail's pace is really a slowcoach.
Lamps were already beginning to shine out, with passenger cars all about and the train moving at a snail's pace.
My train went at a snail's pace all the way.
Government organizations dealt with housing problems at a snail's pace.
Now their cars were moving at a snail's pace through the forest.
Yet here she was exposed to the sun in a broken-down wagon with a broken-down horse, dirty, sweaty, hungry, helpless to do anything but plod along at a snail's pace through a deserted land.
One reason for low efficiency is that organizations are overstaffed, and their work proceeds at a snail's pace.