Just calculate pretenuring ratio when needed.

Just calculate pretenuring ratio when needed.

BUG=
R=mvstanton@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=19144

[mvstanton, 2014-02-06 11:23:33]

that one comment and LGTM.

https://codereview.chromium.org/153863005/diff/1/src/objects-inl.h
File src/objects-inl.h (right):

https://codereview.chromium.org/153863005/diff/1/src/objects-inl.h#newcode1558
src/objects-inl.h:1558: ratio = static_cast<double>(found_count) / create_count;
Per our chat, something like:

bool minimum_met = create_count >= kPretenureMinimumCreated;
double ratio = (minimum_met | FLAG_trace_pretenuring_statistics)
  ? static_cast<double>(found_count) / create_count
  : 0;

and later...
if (minimum_met) { ...decision code.

[Hannes Payer (out of office), 2014-02-06 11:26:52]

https://codereview.chromium.org/153863005/diff/1/src/objects-inl.h
File src/objects-inl.h (right):

https://codereview.chromium.org/153863005/diff/1/src/objects-inl.h#newcode1558
src/objects-inl.h:1558: ratio = static_cast<double>(found_count) / create_count;
On 2014/02/06 11:23:33, mvstanton wrote:
> Per our chat, something like:
> 
> bool minimum_met = create_count >= kPretenureMinimumCreated;
> double ratio = (minimum_met | FLAG_trace_pretenuring_statistics)
>   ? static_cast<double>(found_count) / create_count
>   : 0;
> 
> and later...
> if (minimum_met) { ...decision code.
> 

Done.

[Hannes Payer (out of office), 2014-02-06 11:27:14]

Committed patchset #2 manually as r19144 (presubmit successful).