ASF subversion and git services commented on PROTON-585:

Commit 1596912 from [~astitcher] in branch 'proton/trunk'
[ https://svn.apache.org/r1596912 ]

PROTON-585: Rearrange structures (where possible) to remove padding holes

> Can improve memory use by rearranging structs to eliminate padding
> ------------------------------------------------------------------
>                 Key: PROTON-585
>                 URL: https://issues.apache.org/jira/browse/PROTON-585
>             Project: Qpid Proton
>          Issue Type: Improvement
>          Components: proton-c
>    Affects Versions: 0.6, 0.7
>            Reporter: Andrew Stitcher
>            Assignee: Andrew Stitcher
>            Priority: Minor
> The C/C++ language rules allow compilers to add extra padding in the middle 
> of structs .Generally this is done to maintain the correct ABI alignment for 
> the members.
> This means that by paying attention to the sizes of the members you can 
> eliminate the padding simply by putting the largest members (with the biggest 
> alignment constraint) first then the next then the next down to bitfields (if 
> you are using them).
> Removing the padding can reduce the space used by structs and this can be 
> significant if enough of them are allocated.

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