MYSQL OR vs IN performance

Question

I am wondering if there is any difference in regards to performance between the following

SELECT ... FROM ... WHERE someFIELD IN(1,2,3,4)

SELECT ... FROM ..         


        

Answer 1

I also did a test for future Googlers. Total count of returned results is 7264 out of 10000

SELECT * FROM item WHERE id = 1 OR id = 2 ... id = 10000

This query took 0.1239 seconds

SELECT * FROM item WHERE id IN (1,2,3,...10000)

This query took 0.0433 seconds

IN is 3 times faster than OR