+1 for SPEED.

-dave

On Mar 5, 3:39 pm, Kenton Varda <ken...@google.com> wrote:
> Hi all,
> As you know if you've read the docs carefully, when using C++ or Java
> protocol buffers, for best performance you need to add a line to your .proto
> files:
>
>   option optimize_for = SPEED;
>
> Otherwise, by default, the compiler optimizes for code size.  Optimizing for
> code size results in generated code that around a half to a third of the
> size, but runs an order of magnitude slower.  We make this the default
> because inside Google we've found that code bloat from lots of generated
> code is a serious problem, and we find that we only actually care about
> speed for a small minority of protocols.  However, now I'm worried that
> users who care about speed may be missing the documentation mentioning this
> attribute, and may as a result think protocol buffers are slower than they
> are.  Code size tends only to be a problem for users who have lots and lots
> of protocols, where most only have as small number.
>
> So, tell me:  What should the default be?  I think we can pretty safely
> change the default to SPEED in the next version, but if we do, it will be
> less safe to change the default back to CODE_SIZE in the future.
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