`using Temporal; using Temporal` takes 13 times slower on Julia 1.2, Julia 1.3

[wookay]

here's tests on travis.

• https://travis-ci.org/wookay/TestTemporal.jl/jobs/549070403

$ time julia -e '@info VERSION; using Temporal'
[ Info: 1.1.1
real	0m1.258s
user	0m1.170s
sys	0m0.204s

$ time julia -e '@info VERSION; using Temporal; using Temporal'
[ Info: 1.1.1
real	0m3.696s
user	0m3.576s
sys	0m0.228s

$ time julia -e '@info VERSION; using Temporal; using Temporal; using Temporal'
[ Info: 1.1.1
real	0m3.638s
user	0m3.508s
sys	0m0.245s

• https://travis-ci.org/wookay/TestTemporal.jl/jobs/549070404

$ time julia -e '@info VERSION; using Temporal'
[ Info: 1.3.0-DEV.433
real	0m1.173s
user	0m1.036s
sys	0m0.253s

$ time julia -e '@info VERSION; using Temporal; using Temporal'
[ Info: 1.3.0-DEV.433
real	0m15.681s                      <=====================
user	0m15.503s
sys	0m0.292s

$ time julia -e '@info VERSION; using Temporal; using Temporal; using Temporal'
[ Info: 1.3.0-DEV.433
real	0m15.632s                     <=====================
user	0m15.476s
sys	0m0.268s

[iblislin]

I guess it's related https://github.com/JuliaLang/julia/issues/32971

[PallHaraldsson]

Strange that using the second time adds time (close to as much as the first time, or even worse). Can it simply be avoided until this is fixed?