Very slow delete on mysql base with subquery

Question

This mysql query is running for around 10 hours and has not finished. Something is horribly wrong.

Two tables (text and spam) are here. Spam stores the ids of spam e

Answer 1

of corse it will take a lot of time because it execute the subquery for every record but by using INNER JOIN directly this query is executed only one time lets think that the query will take

10 ms for 50000 rec  full time = 50000 * 10 ms ---> 8.333 minutes !! at least don't forget the condition and deleting time .....

but using join the query will be executed only one time :

DELETE t FROM tname.text t INNER JOIN (SELECT textid FROM spam) sq on t.old_id = sq.textid ;