[Webkit-unassigned] [Bug 68320] DFG JIT does not speculate aggressively enough on GetById
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Sun Sep 18 13:08:30 PDT 2011
https://bugs.webkit.org/show_bug.cgi?id=68320
--- Comment #5 from Filip Pizlo <fpizlo at apple.com> 2011-09-18 13:08:31 PST ---
This looks like it's doing some badness for Kraken. Will investigate.
Benchmark report for SunSpider, V8, and Kraken.
VMs tested:
"TipOfTree" at /Volumes/Data/pizlo/quinary/OpenSource/WebKitBuild/Release/jsc
"GetByOffset" at /Volumes/Data/pizlo/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 GetByOffset
SunSpider:
3d-cube 7.5804+-0.1025 ? 7.6657+-0.1333 ? might be 1.0113x slower
3d-morph 7.4365+-0.1415 7.3918+-0.1206
3d-raytrace 7.6661+-0.1294 ? 7.7235+-0.0875 ?
access-binary-trees 2.2694+-0.0512 2.2500+-0.0551
access-fannkuch 11.5251+-0.2310 11.4352+-0.1252
access-nbody 4.2127+-0.0956 ^ 3.7493+-0.0932 ^ definitely 1.1236x faster
access-nsieve 2.5927+-0.0339 2.5845+-0.0651
bitops-3bit-bits-in-byte 1.6769+-0.0350 ? 1.6862+-0.0559 ?
bitops-bits-in-byte 2.7056+-0.0484 2.6958+-0.0434
bitops-bitwise-and 3.6031+-0.1254 ? 3.6406+-0.1198 ? might be 1.0104x slower
bitops-nsieve-bits 5.2817+-0.1050 ? 5.3470+-0.0798 ? might be 1.0124x slower
controlflow-recursive 1.9900+-0.0507 ? 2.0723+-0.0604 ? might be 1.0414x slower
crypto-aes 7.0620+-0.2252 6.9372+-0.2120 might be 1.0180x faster
crypto-md5 2.7704+-0.0604 2.7578+-0.0877
crypto-sha1 2.1668+-0.0376 ? 2.1892+-0.0495 ? might be 1.0104x slower
date-format-tofte 9.9513+-0.1459 ? 10.0977+-0.1961 ? might be 1.0147x slower
date-format-xparb 8.8571+-0.1317 8.7075+-0.1660 might be 1.0172x faster
math-cordic 6.1409+-0.1022 ? 6.2348+-0.2257 ? might be 1.0153x slower
math-partial-sums 7.4173+-0.1544 7.3043+-0.1211 might be 1.0155x faster
math-spectral-norm 2.5619+-0.0318 ? 2.5942+-0.0542 ? might be 1.0126x slower
regexp-dna 10.8761+-0.2557 10.7495+-0.1449 might be 1.0118x faster
string-base64 5.7409+-0.1239 5.6667+-0.1387 might be 1.0131x faster
string-fasta 7.0083+-0.1162 ? 7.0727+-0.1328 ?
string-tagcloud 11.8651+-0.1467 11.7426+-0.2059 might be 1.0104x faster
string-unpack-code 18.8426+-0.3420 18.6557+-0.2536 might be 1.0100x faster
string-validate-input 6.6370+-0.2098 6.4269+-0.1164 might be 1.0327x faster
<arithmetic> 6.4015+-0.0389 6.3607+-0.0311
<geometric> 5.2729+-0.0289 5.2464+-0.0233
<harmonic> 4.2973+-0.0306 4.2888+-0.0286
TipOfTree GetByOffset
V8:
crypto 83.5475+-0.8616 ? 85.2520+-1.0487 ? might be 1.0204x slower
deltablue 242.3931+-2.8106 ^ 226.9906+-1.2293 ^ definitely 1.0679x faster
earley-boyer 96.2478+-0.4171 ^ 93.4152+-0.6641 ^ definitely 1.0303x faster
raytrace 69.6915+-0.4099 ^ 64.1450+-0.3871 ^ definitely 1.0865x faster
regexp 107.7330+-1.6024 106.3051+-0.5100 might be 1.0134x faster
richards 217.4246+-1.6886 ^ 201.0345+-1.6029 ^ definitely 1.0815x faster
splay 100.1975+-2.4578 98.5484+-0.4887 might be 1.0167x faster
<arithmetic> 131.0336+-0.9944 ^ 125.0987+-0.2380 ^ definitely 1.0474x faster
<geometric> 117.9991+-0.8652 ^ 113.5980+-0.2332 ^ definitely 1.0387x faster
<harmonic> 108.1704+-0.7331 ^ 104.5304+-0.2575 ^ definitely 1.0348x faster
TipOfTree GetByOffset
Kraken:
ai-astar 639.2052+-9.5529 ^ 617.7010+-5.2686 ^ definitely 1.0348x faster
audio-beat-detection 469.1687+-4.6644 ? 475.5938+-5.4870 ? might be 1.0137x slower
audio-dft 427.3820+-6.7772 419.8933+-4.6365 might be 1.0178x faster
audio-fft 364.7972+-1.1347 ! 371.4988+-2.9430 ! definitely 1.0184x slower
audio-oscillator 313.8251+-0.8023 ! 388.3917+-2.8457 ! definitely 1.2376x slower
imaging-darkroom 411.9896+-0.7587 ? 420.0720+-8.4754 ? might be 1.0196x slower
imaging-desaturate 218.3297+-0.3545 217.8529+-0.5346
imaging-gaussian-blur 587.5906+-2.2849 ? 590.5179+-1.0733 ?
json-parse-financial 49.8097+-0.4280 ^ 48.8371+-0.2607 ^ definitely 1.0199x faster
json-stringify-tinderbox 68.3106+-0.4785 ? 68.9709+-0.6994 ?
stanford-crypto-aes 144.6621+-1.6741 143.5692+-1.5384
stanford-crypto-ccm 111.8888+-0.6187 ? 112.4789+-1.2441 ?
stanford-crypto-pbkdf2 388.5531+-2.2593 ! 396.6219+-2.2329 ! definitely 1.0208x slower
stanford-crypto-sha256-iterative 147.8469+-0.6880 ? 149.7923+-2.0456 ? might be 1.0132x slower
<arithmetic> 310.2399+-0.5340 ! 315.8423+-1.0812 ! definitely 1.0181x slower
<geometric> 242.6350+-0.3027 ! 246.7610+-0.7284 ! definitely 1.0170x slower
<harmonic> 173.7287+-0.4609 ! 174.8320+-0.4895 ! definitely 1.0064x slower
TipOfTree GetByOffset
All benchmarks:
<arithmetic> 115.4688+-0.1885 ! 116.2311+-0.3077 ! definitely 1.0066x slower
<geometric> 26.2069+-0.0884 26.1173+-0.0668
<harmonic> 7.5860+-0.0528 7.5692+-0.0494
--
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
More information about the webkit-unassigned
mailing list