[Webkit-unassigned] [Bug 89239] New: IndexedDB: Don't do full commit for read-only transactions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=89239

           Summary: IndexedDB: Don't do full commit for read-only
                    transactions
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jsbell at chromium.org
                CC: dgrogan at chromium.org, alecflett at chromium.org


For read-only IDB transactions we go through the full motions of an backing store commit, including creating/writing a (presumably empty) leveldb writebatch.

This can be short-circuited, which would eliminate unnecessary work and make the read-only transaction resilient to backing store faults (e.g. disk has gone away but data is still in memory)

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