[Webkit-unassigned] [Bug 118891] Make PerformanceTests/Layout/line-layout.html 2.6-2.9% faster

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=118891





--- Comment #4 from Ryosuke Niwa <rniwa at webkit.org>  2013-07-19 01:39:52 PST ---
Created an attachment (id=207067)
 --> (https://bugs.webkit.org/attachment.cgi?id=207067&action=review)
More diff

Increasing the inline capacity to 64 didn't have any effect as expected.

Apparently this code is insanely hot. Just adding the code in clear() reduces the perf. win to 1.86%:

inline void TrailingObjects::clear()
{
    m_whitespace = 0;
    m_boxes.resize(0);
    if (m_boxes.size() > 200000)
        m_boxes.clear();
}

This is shockingly terrifying.

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