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<body><span class="vcard"><a class="email" href="mailto:fpizlo@apple.com" title="Filip Pizlo <fpizlo@apple.com>"> <span class="fn">Filip Pizlo</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - Bogus uses of regexp matching should realize that they will OOM before they start swapping"
href="https://bugs.webkit.org/show_bug.cgi?id=158142">bug 158142</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Assignee</td>
<td>webkit-unassigned@lists.webkit.org
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<td>fpizlo@apple.com
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Bogus uses of regexp matching should realize that they will OOM before they start swapping"
href="https://bugs.webkit.org/show_bug.cgi?id=158142#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Bogus uses of regexp matching should realize that they will OOM before they start swapping"
href="https://bugs.webkit.org/show_bug.cgi?id=158142">bug 158142</a>
from <span class="vcard"><a class="email" href="mailto:fpizlo@apple.com" title="Filip Pizlo <fpizlo@apple.com>"> <span class="fn">Filip Pizlo</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=279936&action=diff" name="attach_279936" title="it does something">attachment 279936</a> <a href="attachment.cgi?id=279936&action=edit" title="it does something">[details]</a></span>
it does something
The intuition is that the individual regexp matches are not really observable, so if we detect trouble, we can just do a dry run to see how bad things get before we start allocating tons of memory.
On my test case (from jsfunfuzz), this reduces the runtime by >10x and reduces memory usage by ~8x and eliminates swapping. Hooray.</pre>
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