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   alt.comp.os.windows-11      Steaming pile of horseshit Windows 11      4,852 messages   

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   Message 4,072 of 4,852   
   Paul to sticks   
   Re: Windows fans: tell me where the narr   
   26 Jan 26 16:02:11   
   
   From: nospam@needed.invalid   
      
   On Mon, 1/26/2026 10:22 AM, sticks wrote:   
   > On 1/25/2026 8:42 PM, Paul wrote:   
   >   
   > ---snip---   
   >   
   >> #  In Summary   
   >>   
   >> Windows Update’s “slow phase” is dominated by:   
   >>   
   >> | Stage                   | What Happens    
                             | Why It is S   
   ow                   |   
   >> |-------------------------|----------------------------------   
   ------|----------------------------------|   
   >> | Manifest parsing        | Load thousands of XML mani   
   ests         | Many tiny files, heavy parsing   |   
   >> | Supersedence evaluation | Compare each component to WinSxS          
   | Graph traversal, pointer chasing |   
   >> | Applicability rules     | Evaluate prerequisites and dependencies |   
   Constraint solving               |   
   >> | Transaction planning    | Build install plan         
                  | Large metadata structures        |   
   >>   
   >> This is fundamentally a **metadata computation problem**, not an I/O   
   problem.   
   >>   
   >> Your observation about L3 cache is spot-on: the workload is m   
   mory-latency-bound.   
   >>   
   >> *********************  End: CoPilot Answer  ************************   
   >>   
   >>     Paul   
   >   
   > Thanks for the very interesting work to show us exactly what the process all   
   involves.  Very informative and helpful!   
      
   I just thought it was weird, that the machine with more L3,   
   seems to be doing updates faster. My original conclusion was   
   that there was cheating of some sort going on :-)   
      
      Paul   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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