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jemalloc has an alternative API that allows specifying the size of the allocation: sdallocx [1]. [1]: http://www.canonware.com/download/jemalloc/jemalloc-lates

• Someone 10y ago
  "jemalloc has an alternative API that allows specifying the size of the allocation" I would like to see an API for malloc where you don't need to specify the size of the allocation :-) For those who wonder: it takes additional flags specifying alignment, whether to zero memory, whether to store data in a thread-specific cache, or am arena to use.