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authorArseny Kapoulkine <arseny.kapoulkine@gmail.com>2016-04-14 08:43:06 -0700
committerArseny Kapoulkine <arseny.kapoulkine@gmail.com>2016-04-14 08:43:06 -0700
commit2d5980b406fc1efaa63b8f18bcc1b25ab8ec8268 (patch)
tree54b0f5b102782f9f3a39d43c4b2de67cb95b42b0 /README.md
parent2e0ed8284b7488f9664bf8dba9aae90688862cc3 (diff)
Adjust XML allocation pages to have the exact specified size
Previously the page size was defining the data size, and due to additional headers (+ recently removed allocation padding) the actual allocation was a bit bigger. The problem is that some allocators round 2^N+k allocations to 2^N+M, which can result in noticeable waste of space. Specifically, on 64-bit OSX allocating the previous page size (32k+40) resulted in 32k+512 allocation, thereby wasting 472 bytes, or 1.4%. Now we have the allocation size specified exactly and just recompute the available data size, which can in small space savings depending on the allocator.
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