Consider short strings for String.prototype.substring results

NEW
Unassigned

Status

()

Core
JavaScript Engine
7 years ago
3 years ago

People

(Reporter: Igor Bukanov, Unassigned)

Tracking

Firefox Tracking Flags

(Not tracked)

Details

(Reporter)

Description

7 years ago
Currently str_substring implementing String.prototype.substring always creates dependent strings even if the result fits the short string. Although the short strings do take more memory using them would avoid flattening of the base string if it is a rope. Another advantage of the short string is that it does not prevent the base string from the GC.

So even if using short strings unconditionally may slow things down we should consider using them even if the base string is a rope or a likely to be short-lived based, for example, on a length heuristics.
Duplicate of this bug: 617148
(Assignee)

Updated

3 years ago
Assignee: general → nobody
You need to log in before you can comment on or make changes to this bug.