[Webkit-unassigned] [Bug 135939] New: Remove PurgeableBuffer since it is not very useful any more
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Aug 14 07:58:22 PDT 2014
https://bugs.webkit.org/show_bug.cgi?id=135939
Summary: Remove PurgeableBuffer since it is not very useful any
more
Product: WebKit
Version: 528+ (Nightly build)
Platform: Unspecified
OS/Version: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: Platform
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: psolanki at apple.com
CC: ap at webkit.org, koivisto at iki.fi, beidson at apple.com,
akling at apple.com, psolanki at apple.com
The utility of purgeable memory for cached resources has diminished over time. Currently, WebKit uses file backed resources when possible. Since this is read only memory, it is in essence "purgeable". Having the PurgeableBuffer code adds additional complexity that we don't need. e.g. on my Mac, I am not seeing any entry for "WebCore purgeable data" when I run mmap against the web processes that I have running. It is used on iOS, however even there much of the purgeable memory we create gets replaced by file backed memory once we get the notification from CFNetwork.
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