Windows 10: Windows 10 1809 Benchmarks. The Spectre patch kills performance.

Everyone run for their AMD machines, this Spectre patch in 1809 is crucifying machine performance.

This is a small portion of benchmarking numbers from our MFC CAD application. It's getting on in years and doesn't use any GPU acceleration. Even an 1809 machine without the Spectre patch performs badly against a 1709 build.

OUTSIDE LIMITS test "adviser\analysis\analyseAllRules"
8 ( 4.55 ) secs in "Win10_1709"
13 ( 7.55 ) secs in "Win10_1809_NoSpectre"
22 ( 11.25 ) secs in "Win10_64_1809_WSpectre.htm"

OUTSIDE LIMITS test "adviser\analysis\analyseOneRule"
8 ( 4.80 ) secs in "Win10_1709"
11 ( 8.02 ) secs in "Win10_1809_NoSpectre"
20 ( 11.98 ) secs in "Win10_64_1809_WSpectre.htm"

OUTSIDE LIMITS test "adviser\analysis\filename_invalidForPred"
8 ( 4.69 ) secs in "Win10_1709"
11 ( 7.80 ) secs in "Win10_1809_NoSpectre"
22 ( 11.86 ) secs in "Win10_64_1809_WSpectre.htm"

OUTSIDE LIMITS test "adviser\analysis\report"
8 ( 4.59 ) secs in "Win10_1709"
11 ( 7.63 ) secs in "Win10_1809_NoSpectre"
20 ( 11.50 ) secs in "Win10_64_1809_WSpectre.htm"

OUTSIDE LIMITS test "adviser\decouplingFiles\AN-Pins_NoPart"
7 ( 4.45 ) secs in "Win10_1709"
11 ( 7.59 ) secs in "Win10_1809_NoSpectre"
20 ( 11.83 ) secs in "Win10_64_1809_WSpectre.htm"

OUTSIDE LIMITS test "adviser\decouplingFiles\analyseBrowse"
8 ( 5.25 ) secs in "Win10_1709"
11 ( 8.06 ) secs in "Win10_1809_NoSpectre"
19 ( 11.66 ) secs in "Win10_64_1809_WSpectre.htm"

:)

 

Spectre Patch reinstall

If I install Spectre patch on windows 10 1703 (KB4056891).

Then Windows update ask me to upgrade to Windows Build 1709.

Do I need to reinstall the Spectre patch or not?

 

Windows Update Intel Patches for Meltdown & Spectre

URGENT - Please Microsoft:

1. Provide a List of Windows Updates that included the (bad) Intel Patches for Meltdown & Spectre (which Intel now say should NOT be installed).

2. Advise IF (and HOW) the Windows Updates that included (bad) Intel Patches for Meltdown & Spectre should be 'removed' by End Users?

3. If Microsoft Identifies (to it's Community) Windows Updates that included (bad) Intel Patches, can Users remove them - while still getting any other 'fixes' (that did NOT relate to Meltdown & Spectre) included in the Same Windows Updates that contained
the (bad) Patches for Meltdown & Spectre?

4. How do Users ensure that ant Windows Updates they remove - to 'eject' the (bad) Intel Patch for Meltdown & Spectre - are not 'automatically' re-installed' later - by Automatic Windows Updates, when Windows notices the 'removed updates' are not installed?

Note: I've looked at the Microsoft.com Descriptions of Numerous Recent Windows Updates and (although some refer to 'security') none seem to specifically mention Intel, Meltdown or Spectre - so I can't determine which Windows Updates included the 'bad' Intel
Patches.

 

Performance Impact on Windows Systems with Spectre and Meltdown Mitigations

Quoting this from the source link at the bottom of my post.

Source: Understanding the performance impact of Spectre and Meltdown mitigations on Windows Systems