[Webkit-unassigned] [Bug 127182] New: Web Inspector: freeze when stopped at breakpoint and hovering over huge array

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=127182

           Summary: Web Inspector: freeze when stopped at breakpoint and
                    hovering over huge array
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bas at vanklinkenbergsoftware.nl
                CC: timothy at apple.com, joepeck at webkit.org,
                    webkit-bug-importer at group.apple.com, graouts at apple.com


Context:
I'm developing a financial charting application with WebGL. Huge datasets are displayed and handled (arrays containing up to 500,000 data points).

Issue:
When using the debugger and stopping at breakpoint or manually stepping, when you hover over a variable, a popup will show with the value of the variable. Great feature.
But, when hovering over one of those huge arrays, a popup will show up too, and even show "Array[<huge total>]" header in it, but the rest of the popup stays empty, the tab or window freezes and two processes peg 2 cores at 100%, each using 1,45GB memory (the processes are 'SafariForWebKitDevelopment Web Content' and 'Safari Web Content'). I can then only close the tab or window, the rest of the tab or window is frozen.

Expected behavior:
The first few entries in the array should show up in the popover.

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