Revert of [builtins] DeleteProperty: Handle last-added fast properties...
Revert of [builtins] DeleteProperty: Handle last-added fast properties (patchset #2 id:20001 of https://codereview.chromium.org/2830093002/ ) Reason for revert: Breaks: https://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress/builds/12920 and https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/10281 Original issue's description: > [builtins] DeleteProperty: Handle last-added fast properties > > In general, deleting a property from a fast-properties object > requires transitioning the object to dictionary mode. However, > when the most-recently-added property is deleted, we can simply > roll back the last map transition that the object went through. > > This is a performance experiment: it should make things faster, > but if it turns out to have more negative than positive impact, > we will have to revert it. > > TBR=bmeurer@chromium.org (just adding a comment) > > Review-Url: https://codereview.chromium.org/2830093002 > Cr-Commit-Position: refs/heads/master@{#44799} > Committed: https://chromium.googlesource.com/v8/v8/+/98acfb36e1acf2ab52ab6b6439eb6356c83dcda6 TBR=ishell@chromium.org,jkummerow@chromium.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true Review-Url: https://codereview.chromium.org/2843473002 Cr-Commit-Position: refs/heads/master@{#44806}
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