Comment indexer plugin slowing down comment posting

Hi i noticed that posting comments could take up to 60s.
so i tested deactivating all the plugins and re activating them one by one. the conslusion is that the issue is related to the comment indexer plugin.

is there a way to tweak the plugin to not wait 60s before redirecting?

you can make a test comment on test.spotlife.se

thankful for an answer