Performance Impact of /IntegrityCheck

You can link binaries with /integritycheck. This will tell the loader to check the signature of the binary at load time. Supposedly signing with page hash (/ph) has a substantial impact on load time. Omitting /ph will require the entire binary to be loaded in order to calculate the hash and verify the signature. I assume /ph does it over the pages as the name implies.

https://blogs.msdn.microsoft.com/maartenb/2009/07/23/performance-impact-of-integritycheck/

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