Question Why more RAM makes programs load WAY faster?

[DarkReader]

I had 4gb ram, now i have 8gb.

For example visual studio took 1 minute to fully load and be responding to input. Now it does for 8-10 seconds. The difference is massive.

When i had 4gb, my RAM didn't "overflow" at all. So that wasnt the culprit.
Maybe it finds free space faster when allocating arrays? But even if so, it wouldnt make such a difference right
any insights?

 

[USAFRet]

VisualStudio within 4GB RAM will be slow.
There is a lot of swapping in and out of the pagefile (HDD).

 

[lynx1021]

When windows runs out of memory it uses the page file on the hard drive that is way slowwwwer!