[attila-lendvai]

i want to see some real world numbers about that "massive" impact of trim, which is repeated regularly.

first of all trim only affects write speed (somewhat), which is not really all that important for non-server use.

it also has some impact on wear which is probably more interesting than its performance impact.

[debazel]

The performance loss can be substantial on modern NVMe drives, up to 20 times slower. But I was wrong about the reason for the performance loss, it's not TRIM but how VeraCrypt handles I/O operations. You can see some numbers real numbers in this Github issue: https://github.com/veracrypt/VeraCrypt/issues/136