Bug 138570

Summary:

Object.hasOwnProperty should be more efficient when the property name is not an AtomicString.

Product:

WebKit

Reporter:

Andreas Kling <kling>

Component:

JavaScriptCore

Assignee:

Andreas Kling <kling>

Status:

NEW ---

Severity:

Normal

Priority:

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Patch	none

Description Andreas Kling 2014-11-10 11:47:26 PST

Use JSString::toExistingAtomicString() to avoid churning the AtomicString table
in case the property name being looked up isn't already present.

Add an early return in case it's not an existing AtomicString, since that also 
guarantees the string is not an existing own property name.

Comment 1 Andreas Kling 2014-11-10 11:48:10 PST

Created attachment 241294 [details]
Patch