ManagementObject fastest route

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ManagementObject fastest route

StewartBW 1,805

Hi experts,

Is my usage efficient?

I only need some properties like Manufacturer, Name, Description etc...

If I limit the properties to return by the ManagementObject it will run faster?

If so, what's the fastest way?

Dim Search As New ManagementObjectSearcher(New SelectQuery("Win32_Processor"))
For Each Info As ManagementObject In Search.Get

Info("Manufacturer")
Info("Name")
Info("Description")
etc...

Next

Thanks in advance :)

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Answer 1

Castorix31 90,521

WMI is slow by its architecture

To get processor information, the fastest way is with cpuid instruction, but complicated in VB.NET (with VirtualAlloc, ... AI can give code to be tested)

Otherwise, a simple way is to read registry at :

HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0

StewartBW 1,805 Reputation points

2025-06-28T15:16:08.1233333+00:00
Thanks bro, 2 issues with that, user can simply edit those registry entries and cause invalid data to return, I need much more than just processor, not all the hardware classes are listed.

I guess this code is picking/selecting all properties of Win32_Processor, am I right?

Dim Search As New ManagementObjectSearcher(New SelectQuery("Win32_Processor")) For Each Info As ManagementObject In Search.Get

If so, possible to select and get only required fields, it will improve the reading speed or I should not bother at all?

Thanks indeed :)

Castorix31 90,521

Yes, you can choose columns like in SQL (theorically faster than selecting all columns (*)) :

  Dim sQuery As New SelectQuery("SELECT Name, Manufacturer FROM Win32_Processor")
  Dim search As New ManagementObjectSearcher(sQuery)
  For Each info As ManagementObject In search.Get()
      Dim sName As String = info("Name").ToString()
      Dim sManufacturer As String = info("Manufacturer").ToString()     
  Next

(BTW, if the user edits registry, it will also change returned values from WMI)

StewartBW 1,805 Reputation points

2025-06-29T01:01:54.6533333+00:00

Thanks dude, using the SELECT FROM decreased the processing time by ~50%, so not only theoretically, highly appreciated :)

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