On: Show HN: Work with CSV files using SQL. For data s...

[simlan]

Which is likely how this works under the hood.

[tanin → simlan]

OP here.

Yes! we use Sqlite under the hood with modified C extensions, so it can be as fast as it can be. (Just try not to touch JS code for this)

However, I have recently learned that SIMD is even faster than C, but I haven't explored it yet.