[narsil]

This is how I felt about Algolia's search when I first enabled it for our Vuepress site at https://developers.kloudless.com/guides/enterprise/ (the search bar at the very top). I assumed it had loaded some kind of index in memory via JavaScript since the XHR requests take < 30 ms (!) from my location in San Francisco, which is pretty much instant. That's faster than the delay between my keystrokes.

[benbristow]

Returns in the same speed from Scotland (Glasgow) too. One request was as low as 16ms. Impressive.

[ddorian43]

Algolia is in-memory & sorted. So it can do A LOT of early termination of queries and no sorting on query-time.