LOAD DATA INFILE, are indexes updated?

Question

MySQL

There is a need to regularly upload a lot of data to the Mysql table very quickly (hundreds of thousands of records in a few seconds). I use the LOAD DATA INFILE construct for this .
Who knows if the InnoDB index of the table is rebuilt after adding data in this way? In the manual, I only found an indication of rebuilding indexes when filling in an empty MyISAM table, but this is not my case.

Answer 1

Of course, they are rebuilt if they are active (alter table ... disable keys were not used).
Another question is that their update takes resources, and if for “very fast” indexes are turned off and then turned back on, this will entail a complete rebuild of the indexes, which can be stressful if there was a lot of data, and relatively little was added.