Reviewers: Vyacheslav Egorov, Description: Grow lists by a factor of 2 instead of 1.5 on a resize.
For zone lists this avoids resizing and reduces overall allocation in most cases (especially for small lists). Please review this at https://chromiumcodereview.appspot.com/9323078/ SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/ Affected files: M src/list-inl.h Index: src/list-inl.h =================================================================== --- src/list-inl.h (revision 10611) +++ src/list-inl.h (working copy) @@ -72,9 +72,9 @@ template<typename T, class P> void List<T, P>::ResizeAddInternal(const T& element) { ASSERT(length_ >= capacity_); - // Grow the list capacity by 50%, but make sure to let it grow + // Grow the list capacity by 100%, but make sure to let it grow // even when the capacity is zero (possible initial case). - int new_capacity = 1 + capacity_ + (capacity_ >> 1); + int new_capacity = 1 + 2 * capacity_; // Since the element reference could be an element of the list, copy // it out of the old backing storage before resizing. T temp = element; -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev
