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0 pointsasveikau7y ago0 comments

I believe recent Windows and other recent OSs can hash the contents of pages and de-dupe them, which could have some benefits for the same library linked statically across multiple binaries, assuming the identical code ends up page aligned in the same way. This strategy also has benefits for running VMs with the same OS loaded multiple times.

See: https://en.wikipedia.org/wiki/Kernel_same-page_merging

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maccam947y ago

That requires all of the apps to be built with the same exact version of the library.

asveikauOP7y ago

So does hashing the DLLs before you load them, negating much of the purpose of dynamic linking. That was my point.

Anyway if you really want to get technical, if your sharing method is hashing identical pages, I would bet that you don't actually need the same version of the lib to get nonzero sharing. I would not be surprised if many libs have large ranges of identical pages across point releases. Then it's more a question of: was the same compiler used, did it optimize the same way.

captainredbeard7y ago

Stability across recompiles is poor.

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