Specter/Meltdown performance impact on my Lenovo T450S

Did some quick benchmarks tonight with the mitigation’s enabled and disabled.

I’m losing over 10% performance on a Broadwell i5-5300U





If you want to try yourself here is how you can disable the mitigation’s. Run the following from Command Prompt or PowerShell. Make sure you ‘Run as Administrator’.

Once you’ve changed these registry keys reboot your PC.

This is obviously not recommended for production as you’re disabling important security updates on your system.

To re-enable the protections run the following:


Source: https://support.microsoft.com/en-ca/help/4072698/windows-server-guidance-to-protect-against-the-speculative-execution

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