Of course, in this case, you must indicate a sufficiently large size at the start so as not to end up with a full disk.

This is because when using space on a dynamically allocated virtual hard drive, VirtualBox must support and adjust the 'storage space of the virtual machine, which leads to a decrease in performance. When you create a VM, it is rather recommended to create a fixed hard drive and not dynamically allocated. Then there are some settings to make to speed up a VirtualBox VM. You then have no other choice but to change your PC for a more efficient one. If unfortunately the PC is too old, for example with only 4 GB of RAM, you will quickly be limited. In this case, additional memory may be necessary

Have at least 8 GB of RAM but especially 16 GB of RAM.

run the VM on an SSD, the performance will be better than with an HDD: What is an HDD hard drive and an SSD and their differences.

So, if your PC is relatively old, it is recommended: So on an old PC with little RAM memory, the VM will be slower compared to a newer PC. The speed of your VM depends on the power of your PC. Speed up and optimize a VirtualBox VM Add RAM and install an SSD

1.6 Activate VT-x / AMD-V paravirtualization.

1.3 InstaCheck the VirtualBox Guest Additions.

1 Speed up and optimize a VirtualBox VM.

In this article, you will find all the explanations to make your VirtualBox virtual machine faster. What must be changed and configured for your VM to gain speed?

What are the parameters to speed up your VirtualBox VM? This in order to make your VM as fast as possible. It works well you want to optimize the parameters and settings of your VM. You have just created and installed a new VM on Virtualbox.

Virtualbox vga settings