This may or may not work but if you have any antivirus or other anti malware software then I have found my times for compile and serial etc to be improved by adding the Arduino items to the exclusion lists of such software.
Going to make an assumption (maybe wrongly) that its a windows computer you use ?
Some speed issues may also relate to the computer you are running on and the start up options you have enabled too.
Have seen top of the line computers operate so slowly due to just being gummed up with garbage and unwanted apps or just never ever having a simple clean up.
Check your security as mentioned above first then take a look here and ignore anything that doesn't pertain to you.
Whilst you are still in Wise Reg cleaner check out the optimisation option as it does help with quite a few things but check which ones you may not want to use.
If its Linux or Mac then hopefully somebody else can step in here ?