how long can a spring stay compressed brfore it fails to do what it was intended for.?

Answer 1

if u google this, you will get "spring break," which is, haha, pretty funny b/c you get about 10 pages worth of spring break things.
It depends on the resiliency of the spring, and its restoring force, which is measured by F=-kx, the negative indicating that it's a restoring force, and k being the spring constant, and x being the displacement. The stiffer the spring, the more F or force, and the more the spring is likely to break (just from thinking logically about it.)

Answer 2

It depends on the thickness, length, and what is compressing it.