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Thank you for your replies. @dummzeuch I use RDP to access these servers. Both apps are VCL apps. They don't use FMX. I used spy++ to confirm. JRM uses devexpress components. Anyway, I am going to create a simple VCL app that opens a dialog to see if it is affected. I contacted the vendors. In the TDM case they don't know, and as for JRM, I didn't get an answer yet. It is pretty hard - unless you have the hardware, and you are in control of everything, it's impossible to reproduce the issue. To me this whole thing looks like CPU starvation or CPU throttling that somehow affects these apps more than others. Unfortunately I don't have the knowledge to figure out what the heck is going on and how all these pieces (virtualization, vcl) affect each other. I was hoping that someone came across this before.

Hello, I currently use two apps written in Delphi, Toad Data Modeler (TDM) & The Journal RM (JRM), on a Windows 2016 VM. The specs for the VM are: Hypervisor: VMware ESXi, 6.5.0, 13004031 Model: ProLiant BL460c Gen8 Processor Type: Intel (R) Xeon(R) CPU E5-2560 0 @2.00GHz Specs from the Windows system information: OS Name Microsoft Windows Server 2016 Standard Version 10.0.14393 Build 14393 System Manufacturer VMware, Inc. System Model VMware Virtual Platform Processor Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz, 2000 Mhz, 2 Core(s), 2 Logical Processor(s) I have two issues: 1. The dialogs in both TDM & JRM take a long time to show up, and the higher the CPU usage, the longer it takes for these dialogs to show up. 2. Typing inside the JRM rich-text editors is excruciatingly slow. I type, I stop, and I watch the letters appearing one by one in slo-mo. Needless to say, MS Word doesn't exhibit this behavior. Only these two apps have this issue. I tried to open the Settings dialog of Notepad++, and it's almost instantaneous. I also have a windows 10 VM running on a mac inside desktop parallels, and the performance is very good for both apps. Is there anything I can do to improve the performance - I should add - that is in my power? I don't have control over the hardware and the resources allocated to the VM. Could it be something in the way the VM has been configured in VMware that affects the performance? I find it just very weird that two Delphi apps have this issue. As is, these apps are barely usable. Thanks

Hello, I know, this thread is about using Delphi in a VM. However, I currently use two apps that are written in Delphi, Toad Data Modeler (TDM) & The Journal RM (JRM) on a Windows 2016 VM - I don't know exactly the hardware running them, they are in a data center. I will come back with more details if I manage to get them. I have two issues: 1. The dialogs in both TDM & JRM take a long time to show up and the higher the CPU usage, the longer it takes for these dialogs to show up. 2. Typing inside the JRM richtext editors is very slow. I type, I stop and I watch the letters appearing one by one in slo-mo. Needless to say, word doesn't exhibit this behaviour. Only these two apps have this issue. I tried to open the Settings dialog of Notepad++ and it's almost instantaneous. I also have a windows 10 VM running on a mac inside desktop parallels and the performance is very good for both apps. Is there anything I can do to improve the performance - I should add - that is in my power? I don't have control over the hardware and the VM resources allocation. I find it just very weird that two delphi apps have this issue. As is these apps are barely usable. Thanks OS Name Microsoft Windows Server 2016 Standard Version 10.0.14393 Build 14393 System Manufacturer VMware, Inc. System Model VMware Virtual Platform Processor Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz, 2000 Mhz, 2 Core(s), 2 Logical Processor(s)