In the text, it is fine to say "fastest" because there is a context, but in the title, "fastest" means above everything else in the world because the context ha

In the text, it is fine to say "fastest" because there is a context, but in the title, "fastest" means above everything else in the world because the context has not been established yet to readers. If you read news with "fastest" in the title (e.g. fastest CPU or fastest compiler), it really means the fastest in the world at the time of publication. The author could just say "very fast" or "faster than common hash table libraries" in the title. The current title, IMHO, undermines the quality of the post (which is actually good).