Parallels 15 suddenly got so slow

[Ethosik]

I am not sure what happened here. Suddenly my Windows 10 on Parallels has gotten extremely slow. I have the i9 2019 iMac with 64GB of RAM and 2TB SSD, with the Vega 48 internal and AMD 5700XT external. I had my Windows 10 using 8 processors and never had any issues with it. Suddenly today things have gotten very slow. Even the Windows 10 settings app sometimes gets "lag". I click on Updates for example, and wait a few seconds and it finally shows up.

Visual Studio has gotten absolutely horrible. I had to bump its up to 12 processors in Parallels settings, but its still at 100% CPU for a minute or two before VS is usable. Also, when I started Parallels for the first time today, my network failed to work. I tried various things, but what ultimately worked was unchecking "Connect Mac to this network" and checking it again for a Shared adapter.

Has anyone had this issue happen? I already tried reinstalling Parallels 15, but its still a bit sluggish. Even the browsers are slow. Even the Windows 10 starting animation with the dots going in a circle is very sluggish where this never happened before.

 

[Bob1966]

I've the exact same problem. Using a MacBookPro 16" 64GB 2TB. Brand new win installed, at least after drop the old one i transfer from my old MacBook (2015).
But the new one is much slower than the old one.

 

[BigMcGuire]

This is a nightmare of mine. My parallels 15 is working fine - used it Friday with no problems (with VS 2019). I left VMWare Fusion because of stuff like this.

I find that now and then an errant Office process gets stuck at a high CPU % and brings the VM to a crawl until it is done (or killed).

2017 MBP here. Not experiencing any problems - (just checked for updates - no updates).

Just my experience in the past with VMWare and Parallels - the less processors the faster it runs (for me). I have an i5 on my 2017 MBP - I give Parallels 2 CPUs and almost 8GB of memory.

Never had to play with the network settings and we have a pretty complicated AD at work. :/


Do you have parallels configured for productivity? (I do).

 

[Bob1966]

Just my experience in the past with VMWare and Parallels - the less processors the faster it runs (for me). I have an i5 on my 2017 MBP - I give Parallels 2 CPUs and almost 8GB of memory.

Never had to play with the network settings and we have a pretty complicated AD at work. :/


Do you have parallels configured for productivity? (I do).

configured for productivity? (I do) ... I choosed the "Software-developer-mode"

I give the vm 16GB and let Parallels 8CPUs (since that was default-setting).

I also have VS2019. First i think Resharper was the problem (it is for some reason).
The problem is to find the real cause, because maybe it is not just one point of a single problem.
I switch of part of the MSDefender. Switch off Cortana etc.
But why - by all the patronsof bitsNbytes" - some can imagine to blame MS-Office!?

And why the machine is getting slower when it has plenty of resources (64GB Intel I9).

Install the thing on a CRAY-Supercomputer and we get a commodore 64 back?

 

[BigMcGuire]

configured for productivity? (I do) ... I choosed the "Software-developer-mode"

I give the vm 16GB and let Parallels 8CPUs (since that was default-setting).

I also have VS2019. First i think Resharper was the problem (it is for some reason).
The problem is to find the real cause, because maybe it is not just one point of a single problem.
I switch of part of the MSDefender. Switch off Cortana etc.
But why - by all the patronsof bitsNbytes" - some can imagine to blame MS-Office!?

And why the machine is getting slower when it has plenty of resources (64GB Intel I9).

Install the thing on a CRAY-Supercomputer and we get a commodore 64 back?

Resharper can definitely be intense. I haven't turned off MSDenfender or Cortana. I do know doing TFS gets with 100k+ files takes a lot longer than native OSs. I think there is definitely a loss doing small transactions - so doing tons of small transactions has a cumulative effect.

Bring back Unix Terminals!!!! VIM !!! <cough>. I had a college professor who said the world would be a better place if we did that today.

 

[filmak]

Do you have any Adobe cc apps installed?
If yes, quit completely the always running Adobe creative cloud app, and check the speed difference...

 

[Bob1966]

Do you have any Adobe cc apps installed?
If yes, quit completely the always running Adobe creative cloud app, and check the speed difference...

No! I'am the VisualStudio19 SQL-Server etc. Type of User.

But i've installed the same environment now on a Standard-Lenovo-Tower. It runs very well.
On the Parallels-MacBook Visual-Studio crashes completely. The whole 5.000 Bucks-Installation is nearly useless.

 

[filmak]

check in Parallels win installation at the app tray, if there is the one drive app, close it, or for testing purposes close all apps one by one in the tray.
I have experienced slow performance after some win update installed new stuff in tray (running continuously)...
One drive and one note app are suspicious for slowing down too...

 

[ThunderSkunk]

Yeh, I’m finding it runs poorly on Catalina, which, for all I know may be the source of its troubles since Catalina is so unstable on this mbp16, but after buying a year of it, I also discovered you lose the ability to even use your Parallels purchase after your year is up. So there‘s no getting a stable install of it and just leaving it working anymore. Other fun surprises are that it also only covers a single install, so you can’t use it on your desktop and then switch over to your notebook. You can transfer it from one computer to another but you have to email account support and beg parallels to allow it on their end. It also rapidly repeats mouse clicks at your cursor if you use a wacom, making both drawing and normal computer operation impossible. This will be the last money I send to Parallels.

 

[donawalt]

You can transfer it from one computer to another but you have to email account support and beg parallels to allow it on their end.

This part is wrong - I have done this many times. You have to log out on the old computer, then the license is available when you want to use it on a new computer - no contact with parallels support is needed. But if you try to log in on a new computer without logging out on an old computer, then you have to contact support. I am surprised they didn't tell you that when you contacted them, they did me the very first time I did it.

It is "one install", I guess you could call it a "fun surprise" if you didn't read the license or know what you are purchasing. I never presumed I could install this on multiple computers.

I am a trackpad guy, can't comment on your mouse woes. I did see slow network issues one time, actually in the last week. I just closed Parallels and restarted it, and network was the same as host MacBook Pro - for me, around 530 mbps down. So there must be some bug or anomaly there, but it corrected itself on a reboot. Not a deal breaker. Good luck with VMWare, you'll love it.

 

[Danny Scheelings]

I am also using Parallels with Windows 10 and Visual Studio 2019. I compared building and starting a C# web project in the same VM in VMWare Fusion as the VM in Parallels and it took about 60 seconds in Parallels compared to 30 seconds in VMWare.
My default setting for number of CPU's in Parallels was 8, but when I changed this to 4 building the web project also took about 30 seconds in Parallels.