[Webkit-unassigned] [Bug 75160] DFG should not speculate array even when predictions say that the base is not an array
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Dec 22 20:07:33 PST 2011
https://bugs.webkit.org/show_bug.cgi?id=75160
--- Comment #1 from Filip Pizlo <fpizlo at apple.com> 2011-12-22 20:07:34 PST ---
The performance looks good.
Benchmark report for SunSpider, V8, and Kraken on nitroflex (MacBookPro8,2).
VMs tested:
"TipOfTree" at /Volumes/Data/pizlo/quinary/OpenSource/WebKitBuild/Release/jsc (r103599)
"FixArraySpec" at /Volumes/Data/pizlo/septenary/OpenSource/WebKitBuild/Release/jsc (r103599)
Collected 12 samples per benchmark/VM, with 4 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.
TipOfTree FixArraySpec
SunSpider:
3d-cube 5.4322+-0.1349 ? 5.6316+-0.1825 ? might be 1.0367x slower
3d-morph 7.6241+-0.1336 ? 7.8998+-0.1427 ? might be 1.0362x slower
3d-raytrace 7.2338+-0.2181 6.9108+-0.1660 might be 1.0467x faster
access-binary-trees 1.4657+-0.0475 ? 1.5028+-0.0440 ? might be 1.0253x slower
access-fannkuch 5.9223+-0.1049 5.8462+-0.1305 might be 1.0130x faster
access-nbody 3.1700+-0.0650 ? 3.2309+-0.0952 ? might be 1.0192x slower
access-nsieve 2.5472+-0.0812 2.5276+-0.0834
bitops-3bit-bits-in-byte 1.2227+-0.0263 ? 1.2359+-0.0251 ? might be 1.0107x slower
bitops-bits-in-byte 2.3323+-0.0647 ? 2.3852+-0.0631 ? might be 1.0227x slower
bitops-bitwise-and 3.2318+-0.0509 3.1611+-0.0591 might be 1.0224x faster
bitops-nsieve-bits 5.5611+-0.1517 ? 5.6240+-0.1805 ? might be 1.0113x slower
controlflow-recursive 2.0085+-0.0354 2.0031+-0.0451
crypto-aes 7.2740+-0.1930 7.2613+-0.1684
crypto-md5 2.4196+-0.0830 2.2977+-0.0561 might be 1.0531x faster
crypto-sha1 2.1611+-0.0569 ^ 2.0626+-0.0211 ^ definitely 1.0477x faster
date-format-tofte 9.6833+-0.1646 ? 9.8702+-0.2443 ? might be 1.0193x slower
date-format-xparb 9.3604+-0.2243 9.0744+-0.2438 might be 1.0315x faster
math-cordic 6.7665+-0.1802 ^ 6.4100+-0.0995 ^ definitely 1.0556x faster
math-partial-sums 7.4987+-0.1460 7.3974+-0.1758 might be 1.0137x faster
math-spectral-norm 2.4264+-0.0600 ^ 2.2969+-0.0403 ^ definitely 1.0564x faster
regexp-dna 7.8045+-0.1498 ? 7.8713+-0.1829 ?
string-base64 4.3162+-0.0961 ? 4.3197+-0.0836 ?
string-fasta 6.5668+-0.1685 ? 6.6606+-0.1461 ? might be 1.0143x slower
string-tagcloud 11.2059+-0.3212 11.1837+-0.3368
string-unpack-code 18.6572+-0.2556 ! 19.4146+-0.4259 ! definitely 1.0406x slower
string-validate-input 5.2159+-0.1394 ? 5.3330+-0.1395 ? might be 1.0225x slower
<arithmetic> * 5.7349+-0.0228 ? 5.7466+-0.0250 ? might be 1.0020x slower
<geometric> 4.6434+-0.0244 4.6287+-0.0174 might be 1.0032x faster
<harmonic> 3.7042+-0.0305 3.6860+-0.0222 might be 1.0049x faster
TipOfTree FixArraySpec
V8:
crypto 71.8487+-1.1093 ? 72.5179+-1.3046 ?
deltablue 148.8421+-1.8166 ? 150.0586+-2.0018 ?
earley-boyer 81.0571+-1.3352 80.1978+-1.2853 might be 1.0107x faster
raytrace 48.6882+-0.6206 48.2623+-0.5122
regexp 103.5850+-1.2806 103.2427+-1.3837
richards 119.6485+-2.2200 ? 119.9926+-1.6852 ?
splay 72.9114+-1.1946 71.6281+-1.0240 might be 1.0179x faster
<arithmetic> 92.3687+-0.5766 92.2714+-0.4434 might be 1.0011x faster
<geometric> * 87.1162+-0.4927 86.8652+-0.3687 might be 1.0029x faster
<harmonic> 82.0861+-0.4613 81.7185+-0.3335 might be 1.0045x faster
TipOfTree FixArraySpec
Kraken:
ai-astar 487.4671+-9.1501 ? 490.8994+-8.8718 ?
audio-beat-detection 173.1296+-2.4283 ? 174.0663+-2.0968 ?
audio-dft 274.2012+-6.0389 ? 289.0841+-13.0264 ? might be 1.0543x slower
audio-fft 105.7167+-1.3699 ? 106.2648+-2.2146 ?
audio-oscillator 251.0460+-3.1180 ? 253.5859+-2.6535 ? might be 1.0101x slower
imaging-darkroom 274.2502+-7.4916 270.1415+-4.3273 might be 1.0152x faster
imaging-desaturate 213.0163+-2.7294 ^ 207.4625+-2.3983 ^ definitely 1.0268x faster
imaging-gaussian-blur 490.7493+-6.7053 ? 491.2765+-4.1039 ?
json-parse-financial 57.8758+-0.9378 57.7195+-0.6103
json-stringify-tinderbox 71.9223+-0.8206 ! 75.0309+-1.1276 ! definitely 1.0432x slower
stanford-crypto-aes 97.7883+-1.6026 ? 98.5023+-1.1097 ?
stanford-crypto-ccm 101.6361+-1.4094 98.6146+-1.8832 might be 1.0306x faster
stanford-crypto-pbkdf2 187.9598+-2.5805 ! 196.0925+-4.6267 ! definitely 1.0433x slower
stanford-crypto-sha256-iterative 83.2351+-0.8420 ? 84.1820+-1.4587 ? might be 1.0114x slower
<arithmetic> * 204.9996+-0.8833 ? 206.6373+-1.2806 ? might be 1.0080x slower
<geometric> 165.2800+-0.5767 ? 166.5716+-0.9356 ? might be 1.0078x slower
<harmonic> 134.7099+-0.4094 ? 135.7406+-0.8223 ? might be 1.0077x slower
TipOfTree FixArraySpec
All benchmarks:
<arithmetic> 77.9933+-0.2958 ? 78.4731+-0.3703 ? might be 1.0062x slower
<geometric> 20.8247+-0.0618 ? 20.8276+-0.0601 ? might be 1.0001x slower
<harmonic> 6.5202+-0.0522 6.4894+-0.0382 might be 1.0048x faster
TipOfTree FixArraySpec
Geomean of preferred means:
<scaled-result> 46.7865+-0.1434 ? 46.8973+-0.1285 ? might be 1.0024x slower
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