[Webkit-unassigned] [Bug 18956] New: CachedScript and CachedCSSStyleSheet double-retain memory
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu May 8 16:05:18 PDT 2008
http://bugs.webkit.org/show_bug.cgi?id=18956
Summary: CachedScript and CachedCSSStyleSheet double-retain
memory
Product: WebKit
Version: 526+ (Nightly build)
Platform: All
OS/Version: All
Status: UNCONFIRMED
Severity: Normal
Priority: P2
Component: WebCore Misc.
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: mike at belshe.com
CachedScript and CachedCSSStyleSheet both derive from CachedResource.
CachedResource contains a StringBuffer m_data.
Internally, when data is assigned to the CachedScript and CachedCSSStyleSheet,
they decode the m_data buffer, and store the result into a private string
(m_script and m_sheet, respectively).
Thus, each of these objects has two in-memory copies of the cached object. The
m_data is actually not needed and can be removed. The only thing which uses it
is the InspectorController; and that usage can be removed with a small amount
of work.
For www.cnn.com, this led to a 600KB footprint reduction.
For www.yahoo.com, this led to a ~2MB footprint reduction.
I will post a patch when it's ready.
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