Only call GC.start if we have resized some images. This should make jekyll more responsive after files have changed.
Only call GC.start if we have resized some images. This should make jekyll more responsive after files have changed.

RichardLitt/jekyll-gallery-generator,ggreer/jekyll-gallery-generator,ggreer/jekyll-gallery-generator,RichardLitt/jekyll-gallery-generator