madge: Current `--circular` CLI is much slower than 0.6.0

v1.1.0

time ./node_modules/.bin/madge --circular src/app.js
No circular dependencies found!

real    0m24.876s
user    0m24.829s
sys 0m0.132s

v0.6.0

time ./node_modules/.bin/madge --format es6 --exclude=node_modules --circular src/app.js
No circular dependencies found!

real    0m0.298s
user    0m0.267s
sys 0m0.038s

I love this module btw, I have caught multiple circular dependencies using it, so thanks for all your work!