It is generally not recommended to execute software directly from secondary storage, such as a hard drive or SSD, because accessing data from secondary storage is significantly slower than accessing data from RAM. The speed difference is due to the fact that RAM is a volatile memory that can be accessed much more quickly than non-volatile storage like a hard drive or SSD.
When software is executed from secondary storage, the computer must constantly read and write data from the storage device, which can significantly slow down the performance of the software. In contrast, when software is loaded into RAM, the computer can access the data much more quickly, which can significantly improve the performance of the software. In addition, loading a large software into RAM can also improve the overall performance of the computer by freeing up space on the hard drive or SSD. When a large software is loaded into RAM, it is no longer taking up space on the hard drive, which can improve the overall performance of the computer by allowing it to access data from the hard drive more quickly.
Overall, it is generally not recommended to execute a large software directly from secondary storage due to the significant performance drawbacks compared to loading the software into RAM.