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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Allow object allocation sinking through GetScope, GetExecutable and SkipScope nodes"
href="https://bugs.webkit.org/show_bug.cgi?id=146431">146431</a>
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<th>Summary</th>
<td>Allow object allocation sinking through GetScope, GetExecutable and SkipScope nodes
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>528+ (Nightly build)
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<th>Hardware</th>
<td>Unspecified
</td>
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>JavaScriptCore
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>basile_clement@apple.com
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<pre>We are currently considering GetScope, GetExecutable and SkipScope nodes as blocking sinking of function and allocations, while this definitely shouldn't be the case.
This is a ~10% speedup on octane/earley (Conf#1 is ToT, Conf#2 is ToT w/ this patch):
Collected 6 samples per benchmark/VM, with 6 VM invocations per benchmark. Emitted a call to gc()
between sample measurements. Used 1 benchmark iteration per VM invocation for warm-up. Used the
jsc-specific preciseTime() function to get microsecond-level timing. Reporting benchmark execution
times with 95% confidence intervals in milliseconds.
Conf#1 Conf#2
encrypt 0.31553+-0.00094 0.31282+-0.00553
decrypt 5.12296+-0.00708 5.12107+-0.00895
deltablue x2 0.24604+-0.00074 ? 0.24641+-0.00151 ?
earley 0.48200+-0.00316 ^ 0.42697+-0.00062 ^ definitely 1.1289x faster
boyer 6.69585+-0.01114 ? 6.69660+-0.01937 ?
navier-stokes x2 6.99958+-0.00259 6.99893+-0.00333
raytrace x2 1.54523+-0.06374 ? 1.55159+-0.05032 ?
richards x2 0.16939+-0.00249 0.16901+-0.00175
splay x2 0.48342+-0.00306 0.48300+-0.00416
regexp x2 36.77174+-0.17936 36.63545+-0.07532
pdfjs x2 55.24960+-0.27697 55.16416+-0.33324
mandreel x2 68.13311+-0.22945 68.00004+-0.15431
gbemu x2 59.30592+-0.40256 58.82190+-1.22108
closure 0.87790+-0.00269 ? 0.87852+-0.00340 ?
jquery 11.57117+-0.11659 11.52107+-0.03844
box2d x2 16.72202+-0.06821 ? 16.73307+-0.04231 ?
zlib x2 516.09832+-21.15309 ? 516.42894+-18.65591 ?
typescript x2 1066.03271+-11.93493 ? 1074.22778+-7.63335 ?
<geometric> 8.68007+-0.02685 8.63929+-0.03370 might be 1.0047x faster</pre>
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