Implementation of external merge sort based on async generators.
The sort function takes an iterable and returns an async generator yielding the input values sorted.
It relies on a merge function which can also be useful on its own, in case you want to merge two or more iterables already sorted.
import { sort } from 'external-merge-sort'
const sorted = sort([3,1,2])
for await (const item of sorted) {
console.log(item)
}the simple usage above is not that useful in practice: the iterable input normally comes from a big file stream and you need to provide additional options to specify:
- maxSize: the size of chunks in which to split the input
- maxFiles: threshold to trigger an additional pass (usually not needed)
- comparer: a custom comparison function
-
store:
an object capable to
writechunks to temporary storage, returning an iterable over stored items