Closed Bug 1245025 Opened 9 years ago Closed 3 years ago

Nursery allocate short life span RegExp object.

Categories

(Core :: JavaScript Engine, defect)

Product:
Core
Component:
JavaScript Engine
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED DUPLICATE of bug 1368461
Tracking Flags:
Tracking Status
firefox47 --- affected

People

(Reporter: arai, Unassigned)

References

Details

Derived from bug 887016. Currently RegExp object can only be allocated with NewObjectKind==TenuredObject. Allocating short life span RegExp object in Nursery will improve performance. in bug 887016's patch, it improves 10% when calling String.prototype.match/search with pattern string with meta char (like str.match("a+")), that allocates temporary RegExp object. This case seems to be rare, as it doesn't appear in octane/regexp, so this won't block bug 887016 for now. of course there will be more applicable cases :)
Status: NEW → RESOLVED
Closed: 3 years ago
Resolution: --- → DUPLICATE
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