"jekyll build --lsi" make blog very very slow

Question

I created a blog with jekyll. Recently related_posts only recommends the latest posts.

I recently used the jekyll build - lsi command to do a good post recommendation.

You can read this part at https://jekyllrb.com/docs/variables/ link. In summary, the liquid variable updates the site.related_posts section to index the relevant posts.

By the way, after that, the build is so slow that it is still slow, even though I've erased all the related gems. _config related variables I do not know how I can get back to it ...

Answer 1

From the very same page you linked to in your question:

For high quality but slow to compute results, run the jekyll command with the --lsi (latent semantic indexing) option.

So, the "slowness" is a documented and expected side-effect to using the --lsi option.

If you feel, the "extra slowness" is seen only in v3.8.x and not in the previous versions, I highly recommend that you open an issue at Jekyll's GitHub repo.