In case there are any NT kernel devs listening: from cold start, an exe that touches ~1gb of memory takes over 100ms to do so due to page handling. With 2MB pages enabled, this drops down to 30ms. This suggests to me that a "MEM_REALLY_COMMIT" VirtualAlloc flag would help?
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Ah yes, you're right, I remember reading about this on Bruce Dawson's blog (which I guess you know already):https://randomascii.wordpress.com/2014/12/10/hidden-costs-of-memory-allocation/#more-1814 …
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Pretty sure it is well documented by the NT devs - or at least, I feel like I remember reading some official breakdowns of how the page provisioning works.
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