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<body><span class="vcard"><a class="email" href="mailto:krinklemail@gmail.com" title="krinklemail@gmail.com">krinklemail@gmail.com</a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - window.performance object resets script-applied properties"
href="https://bugs.webkit.org/show_bug.cgi?id=137407">bug 137407</a>
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<td>krinklemail@gmail.com
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - window.performance object resets script-applied properties"
href="https://bugs.webkit.org/show_bug.cgi?id=137407#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - window.performance object resets script-applied properties"
href="https://bugs.webkit.org/show_bug.cgi?id=137407">bug 137407</a>
from <span class="vcard"><a class="email" href="mailto:krinklemail@gmail.com" title="krinklemail@gmail.com">krinklemail@gmail.com</a>
</span></b>
<pre>Downstream report from Wikimedia where this caused fatal
exceptions for Safari users reading Wikipedia:
<a href="https://phabricator.wikimedia.org/T112287#1638614">https://phabricator.wikimedia.org/T112287#1638614</a>
Test case:
<a href="http://codepen.io/Krinkle/debug/YywQJb">http://codepen.io/Krinkle/debug/YywQJb</a>
It has three checkpoints:
1) Immediately after definition.
2) From a <script src> loaded script.
3) After window.onload.
In Safari 8.0.8, sometimes 'performance.mark' is defined at all thee, sometimes only at #1, sometimes at #1 and #2.</pre>
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