The write speed of a SSD is measured separately for sequential write and random write.
The sequential write speed refers to the speed of storing large blocks of data such as when installing videos or programs of large size.
In contrast, the random write speed is the speed of storing small blocks of data, and it affects the speed of PC booting and program running.
Booting a PC and running a program both require a large number of small files.
Therefore, it’s better to use a SSD with a fast random write speed for these commands.