[Webkit-unassigned] [Bug 70854] Tiered compilation may introduce dangling pointers in constant buffers
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue Oct 25 14:52:27 PDT 2011
https://bugs.webkit.org/show_bug.cgi?id=70854
--- Comment #4 from Filip Pizlo <fpizlo at apple.com> 2011-10-25 14:52:28 PST ---
This is performance neutral.
Benchmark report for SunSpider, V8, and Kraken.
VMs tested:
"TipOfTree" at /Volumes/Data/pizlo/tertiary/OpenSource/WebKitBuild/Release/jsc
"FixConstBuf" at /Volumes/Data/pizlo/secondary/OpenSource/WebKitBuild/Release/jsc
Collected 12 samples per benchmark/VM, with 4 VM invocations per benchmark. 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.
TipOfTree FixConstBuf
SunSpider:
3d-cube 8.0505+-0.0685 7.9359+-0.0667 might be 1.0144x faster
3d-morph 8.6633+-0.1600 8.5361+-0.1439 might be 1.0149x faster
3d-raytrace 8.2059+-0.0931 ? 8.2331+-0.1166 ?
access-binary-trees 1.6886+-0.0054 ? 1.6909+-0.0066 ?
access-fannkuch 7.7687+-0.0229 7.7430+-0.0173
access-nbody 4.5287+-0.0058 4.5236+-0.0081
access-nsieve 3.1825+-0.0146 ? 3.1851+-0.0263 ?
bitops-3bit-bits-in-byte 1.3168+-0.0088 1.3083+-0.0029
bitops-bits-in-byte 5.2742+-0.0120 ? 5.2809+-0.0378 ?
bitops-bitwise-and 3.4759+-0.0796 ? 3.4883+-0.0287 ?
bitops-nsieve-bits 5.6505+-0.0393 5.6337+-0.0351
controlflow-recursive 2.3464+-0.0207 2.3335+-0.0041
crypto-aes 7.6420+-0.0582 7.6371+-0.0855
crypto-md5 2.8606+-0.0154 ? 2.8754+-0.0269 ?
crypto-sha1 2.6375+-0.0088 2.6337+-0.0110
date-format-tofte 10.6854+-0.0953 ? 10.7042+-0.2139 ?
date-format-xparb 10.6916+-0.3089 ^ 9.9594+-0.0866 ^ definitely 1.0735x faster
math-cordic 7.6859+-0.2778 7.6530+-0.2304
math-partial-sums 10.5895+-0.0441 ? 10.6246+-0.0526 ?
math-spectral-norm 2.8830+-0.0048 2.8799+-0.0074
regexp-dna 13.4970+-0.2367 13.4127+-0.2123
string-base64 4.4485+-0.0206 4.4311+-0.0340
string-fasta 7.1101+-0.0349 ? 7.1318+-0.0478 ?
string-tagcloud 13.1894+-0.1249 13.1489+-0.1403
string-unpack-code 22.7091+-0.1914 ? 22.9071+-0.2137 ?
string-validate-input 5.5622+-0.0575 ? 5.5778+-0.0409 ?
<arithmetic> * 7.0132+-0.0274 6.9796+-0.0320
<geometric> 5.6627+-0.0183 5.6401+-0.0180
<harmonic> 4.4705+-0.0137 4.4587+-0.0100
TipOfTree FixConstBuf
V8:
crypto 81.3316+-0.2960 81.2628+-0.2383
deltablue 199.5470+-0.5958 ^ 198.4363+-0.1800 ^ definitely 1.0056x faster
earley-boyer 112.2752+-0.5393 112.1956+-0.7270
raytrace 69.8685+-0.2929 ^ 69.0072+-0.5303 ^ definitely 1.0125x faster
regexp 124.6409+-0.4324 ^ 123.7003+-0.3378 ^ definitely 1.0076x faster
richards 145.2131+-0.8211 ! 146.2276+-0.1030 ! definitely 1.0070x slower
splay 126.0377+-0.3933 ? 126.9318+-0.9943 ?
<arithmetic> 122.7020+-0.1650 122.5374+-0.1746
<geometric> * 116.4504+-0.1692 116.2318+-0.2034
<harmonic> 110.4595+-0.1673 110.1428+-0.2489
TipOfTree FixConstBuf
Kraken:
ai-astar 825.2143+-10.5640 ? 825.3995+-10.4404 ?
audio-beat-detection 214.5992+-1.0426 213.8940+-1.8930
audio-dft 262.4195+-2.9936 261.3936+-2.7625
audio-fft 133.1768+-0.8196 ? 133.2133+-0.6252 ?
audio-oscillator 291.2722+-1.0563 291.2201+-1.0960
imaging-darkroom 452.7566+-6.8243 ? 469.5159+-10.2028 ? might be 1.0370x slower
imaging-desaturate 245.1950+-0.0779 ? 245.2536+-0.0819 ?
imaging-gaussian-blur 621.4870+-0.3604 ? 621.5398+-0.7945 ?
json-parse-financial 71.2894+-0.2024 ^ 70.4558+-0.1478 ^ definitely 1.0118x faster
json-stringify-tinderbox 80.1929+-0.7263 79.4164+-0.3215
stanford-crypto-aes 153.9564+-1.7819 ? 154.6274+-1.2732 ?
stanford-crypto-ccm 118.4293+-1.5540 ^ 115.9632+-0.5710 ^ definitely 1.0213x faster
stanford-crypto-pbkdf2 243.6601+-3.8261 ^ 237.1275+-2.2955 ^ definitely 1.0275x faster
stanford-crypto-sha256-iterative 85.7246+-0.2278 85.2612+-0.2401
<arithmetic> * 271.3838+-1.3983 ? 271.7344+-0.8194 ?
<geometric> 207.2901+-0.7034 206.6849+-0.4216
<harmonic> 163.2860+-0.3995 ^ 162.2276+-0.2552 ^ definitely 1.0065x faster
TipOfTree FixConstBuf
All benchmarks:
<arithmetic> 102.9921+-0.4253 ? 103.0534+-0.2680 ?
<geometric> 25.9617+-0.0675 25.8746+-0.0564
<harmonic> 7.8792+-0.0238 7.8581+-0.0173
TipOfTree FixConstBuf
Geomean of preferred means:
<scaled-result> 60.5170+-0.1693 60.4084+-0.1491
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