First call to ArangoDb very slow (20 seconds) following calls fast

I’ve got ArangoDb running in Docker like this:

List as a hash for lookup in next loop in ArangoDb

If I have one «traversal» like this:

How to Remove Data from two different collections in one query

How can I remove data from two different collections in ArangoDB via one query?

Arango DB : How to Remove Data from two different collections in one query

How can I remove data from two different collections in ArangoDB via one query?