Read-only BFs and XXHash #83
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This was referenced Oct 25, 2019
This was referenced Nov 21, 2019
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Sorry about the combo PR, but that's how we have it in our fork.
This PR adds 2 things:
Switch to XXHash as hash implementation. It's considerably faster than all the others, and has good enough quality for most applications.
Add ability to open files in read-only mode. Useful to share a big read-only BF across processes while preventing modifications, or to open files you have no permission to write.