Only do so if the estimated number of elements is low compared to the
end position for the slice. This is similar to other heuristics used
for array operations that use the %GetElementKeys runtime function.
R=erik.corry@gmail.com
Review URL: http://codereview.chromium.org/7111032
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8184
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
if (end_i < start_i) return result;
- if (IS_ARRAY(this)) {
+ if (IS_ARRAY(this) &&
+ (end_i > 1000) &&
+ (%EstimateNumberOfElements(this) < end_i)) {
SmartSlice(this, start_i, end_i - start_i, len, result);
} else {
SimpleSlice(this, start_i, end_i - start_i, len, result);