Uwe L. Korn created ARROW-665:
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Summary: C++: Move zeroing logic for (re)allocations to the
Allocator
Key: ARROW-665
URL: https://issues.apache.org/jira/browse/ARROW-665
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Uwe L. Korn
Instead of doing this in e.g. the builders, we should move this logic to the
Allocator. For example, jemalloc provides a flag {{MALLOCX_ZERO}} to indicate
that an allocated region should be zeroed. The POSIX API also provides the
(sadly unaligned) {{calloc}} call that returns zeroed pages.
The speciality here is that the pages may already be zeroed by the OS for
security reasons (i.e. so that one process does not see the content of the
process that previously owned this page).
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