Closed
Bug 616941
Opened 14 years ago
Closed 6 years ago
Consider short strings for String.prototype.substring results
Categories
(Core :: JavaScript Engine, defect)
Tracking
()
RESOLVED
FIXED
People
(Reporter: igor, Unassigned)
References
Details
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.
Assignee | ||
Updated•10 years ago
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Assignee: general → nobody
Comment 2•6 years ago
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This eventually tunnels into JSDependentString::new_ now, and that function implements the inline optimization, so this is fixed.
Status: NEW → RESOLVED
Closed: 6 years ago
Resolution: --- → FIXED
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Description
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