[Webkit-unassigned] [Bug 118662] ASSERTION FAILED: divot >= divotLineStart in JSC::ASTBuilder::setExceptionLocation
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue Jul 16 16:11:26 PDT 2013
https://bugs.webkit.org/show_bug.cgi?id=118662
Mark Lam <mark.lam at apple.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|webkit-unassigned at lists.web |mark.lam at apple.com
|kit.org |
--- Comment #2 from Mark Lam <mark.lam at apple.com> 2013-07-16 16:11:22 PST ---
This assertion failure was introduced in the fix for <https://bugs.webkit.org/show_bug.cgi?id=118481>.
The solution for https://bugs.webkit.org/show_bug.cgi?id=118481 (r152494) aimed to ensure that line and column numbers are captured for the divot position in the ExpressionRangeInfo. There were many assertions added to ensure that we have sane lineStart values for computing column numbers.
However, some of these assertions are failing now because the presumed captured divot position isn't always used as the divot when emitting the ExpressionRangeInfo. There's is also a startOffset and an endOffset that can be used to compute an adjusted divot position relative to the passed in divot value. Unfortunately, this does not yield us the correct line and lineStart info for the adjustedDivot. This issue is the source of the assertion failures.
The solution is to introduce a new JSTokenPosition that captures a line number, source offset, and source line start offset. Together, these 3 pieces of info defines a coherent position in the source string. When emitting an ExpressionRangeInfo, we emitted 3 values: 1. a divot position, 2. a startOffset relative to the divot position, and 3. an endOffset relative to the divot position. Previously, the fix in r152494 also added the line and lineStartOffset of the passed in divot position. When the NodesCodegen tries to use the start or end position as the divot instead of the passed in the divot position, then the passed in line and lineStart values are now invalid.
Now, with the current fix, we're going to pass the divot, start, and end positions all as JSTokenPositions i.e. all 3 will have their line and lineStartOffset detail captured. This way, no matter which position (divot, start, or end) the NodesCodegen chooses as the divot position to emit, we'll have the appropriate line and lineStart values to go with it.
Preliminary layout test results of the current fix shows no new test failures. Perf benchmark results also show no regression (differences are in the noise). Here are the detailed results (ws7 is a baseline build of r152583, ws5 is r152583 + the current fix):
=== BEGIN =====================================
Generating benchmark report at /Volumes/Source/ws5/OpenSource/SunSpiderV8SpiderOctaneKrakenJSBenchJSRegressDSP_Eon_20130716_0130_report.txt
And raw data at /Volumes/Source/ws5/OpenSource/SunSpiderV8SpiderOctaneKrakenJSBenchJSRegressDSP_Eon_20130716_0130.json
Benchmark report for SunSpider, V8Spider, Octane, Kraken, JSBench, JSRegress, and DSP on Eon (MacBookAir5,1).
VMs tested:
"Conf#1" at /Volumes/Source/ws7/OpenSource/WebKitBuild/Release/DumpRenderTree (r152583)
"Conf#2" at /Volumes/Source/ws5/OpenSource/WebKitBuild/Release/DumpRenderTree (r152583)
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.
Conf#1 Conf#2
SunSpider:
3d-cube 9.3223+-0.3498 ? 9.3627+-0.3299 ?
3d-morph 7.8883+-0.0655 ? 8.3416+-0.8772 ? might be 1.0575x slower
3d-raytrace 10.4790+-0.2261 ? 11.0784+-0.9571 ? might be 1.0572x slower
access-binary-trees 2.3254+-0.2986 ? 2.4112+-0.3274 ? might be 1.0369x slower
access-fannkuch 8.0938+-1.2990 7.0423+-0.0774 might be 1.1493x faster
access-nbody 4.7696+-0.7781 4.1717+-0.0465 might be 1.1433x faster
access-nsieve 4.3107+-0.1454 ? 4.3573+-0.0638 ? might be 1.0108x slower
bitops-3bit-bits-in-byte 1.9830+-0.0288 ? 2.0419+-0.1008 ? might be 1.0297x slower
bitops-bits-in-byte 2.7566+-0.0351 2.7322+-0.0514
bitops-bitwise-and 2.6184+-0.0593 2.5968+-0.0300
bitops-nsieve-bits 4.9445+-0.6688 4.3322+-0.0762 might be 1.1413x faster
controlflow-recursive 2.6797+-0.2018 ? 3.0085+-0.6940 ? might be 1.1227x slower
crypto-aes 7.6999+-0.2748 ? 8.8789+-1.8346 ? might be 1.1531x slower
crypto-md5 4.1596+-0.0759 4.1591+-0.1091
crypto-sha1 3.4380+-0.2775 3.3485+-0.0557 might be 1.0268x faster
date-format-tofte 12.3159+-0.7845 ? 12.7705+-0.8415 ? might be 1.0369x slower
date-format-xparb 9.7883+-0.6157 ? 9.7965+-0.5808 ?
math-cordic 3.8725+-0.0234 ? 3.8969+-0.0246 ?
math-partial-sums 9.7911+-1.8169 9.1072+-0.5437 might be 1.0751x faster
math-spectral-norm 2.9363+-0.2395 2.7892+-0.0329 might be 1.0527x faster
regexp-dna 10.7449+-0.5993 10.7233+-0.5056
string-base64 5.1336+-0.4824 ? 5.2396+-0.5379 ? might be 1.0207x slower
string-fasta 10.4737+-0.0847 ? 11.0207+-0.9473 ? might be 1.0522x slower
string-tagcloud 12.6691+-0.1835 ? 13.0441+-0.2545 ? might be 1.0296x slower
string-unpack-code 27.7667+-0.3169 ? 27.8846+-0.3285 ?
string-validate-input 9.2620+-1.5414 8.4467+-0.2292 might be 1.0965x faster
<arithmetic> * 7.3932+-0.1852 ? 7.4070+-0.2115 ? might be 1.0019x slower
<geometric> 5.9427+-0.1369 5.9343+-0.1561 might be 1.0014x faster
<harmonic> 4.8480+-0.0969 4.8436+-0.1208 might be 1.0009x faster
Conf#1 Conf#2
V8Spider:
crypto 75.3191+-0.7948 ? 76.0389+-0.8876 ?
deltablue 113.2428+-1.7175 ? 114.0694+-2.2094 ?
earley-boyer 66.0507+-0.4138 ? 67.4076+-2.9583 ? might be 1.0205x slower
raytrace 57.3419+-2.2467 56.0001+-0.9102 might be 1.0240x faster
regexp 91.9139+-1.5549 89.5532+-1.0246 might be 1.0264x faster
richards 100.1643+-1.8618 98.9682+-0.7084 might be 1.0121x faster
splay 55.9167+-3.0460 ? 57.9345+-3.7159 ? might be 1.0361x slower
<arithmetic> 79.9928+-0.9648 ? 79.9960+-0.9711 ? might be 1.0000x slower
<geometric> * 77.3439+-1.1045 ? 77.4490+-1.1613 ? might be 1.0014x slower
<harmonic> 74.8133+-1.2810 ? 75.0205+-1.3679 ? might be 1.0028x slower
Conf#1 Conf#2
Octane and V8v7:
encrypt 0.40724+-0.00449 ? 0.40839+-0.00726 ?
decrypt 7.40209+-0.06643 7.38687+-0.12881
deltablue x2 0.52602+-0.00990 0.51906+-0.00514 might be 1.0134x faster
earley 0.73706+-0.01503 0.73237+-0.01211
boyer 9.36106+-0.10371 ? 9.47685+-0.11086 ? might be 1.0124x slower
raytrace x2 4.26678+-0.06591 4.25450+-0.06255
regexp x2 30.03634+-0.27958 29.73955+-0.38836
richards x2 0.25599+-0.00255 ? 0.25764+-0.00367 ?
splay x2 0.62450+-0.01826 ? 0.64846+-0.02139 ? might be 1.0384x slower
navier-stokes x2 10.02076+-0.10268 10.00299+-0.06790
closure 0.33169+-0.00720 ? 0.33815+-0.00978 ? might be 1.0195x slower
jquery 4.21293+-0.53721 ? 4.26116+-0.55448 ? might be 1.0114x slower
gbemu x2 123.66946+-1.05245 ? 123.90472+-1.02352 ?
mandreel x2 164.13769+-1.29417 ? 164.35895+-1.36208 ?
pdfjs x2 90.53668+-0.78162 ? 91.21170+-3.01742 ?
box2d x2 31.41203+-0.31192 31.32483+-0.34317
V8v7:
<arithmetic> 6.83551+-0.03068 6.80306+-0.05007 might be 1.0048x faster
<geometric> * 2.16990+-0.01151 ? 2.17510+-0.00864 ? might be 1.0024x slower
<harmonic> 0.81561+-0.00580 ? 0.82034+-0.00636 ? might be 1.0058x slower
Octane including V8v7:
<arithmetic> 35.90094+-0.15290 ? 35.96341+-0.31824 ? might be 1.0017x slower
<geometric> * 6.44702+-0.04996 ? 6.46727+-0.04800 ? might be 1.0031x slower
<harmonic> 1.13070+-0.00867 ? 1.13921+-0.01082 ? might be 1.0075x slower
Conf#1 Conf#2
Kraken:
ai-astar 337.764+-9.097 335.027+-4.946
audio-beat-detection 214.936+-3.447 ? 216.139+-3.956 ?
audio-dft 368.201+-11.933 363.961+-11.362 might be 1.0117x faster
audio-fft 124.559+-2.176 ? 128.364+-3.981 ? might be 1.0305x slower
audio-oscillator 224.054+-6.780 ? 224.403+-2.553 ?
imaging-darkroom 272.669+-8.842 272.243+-4.116
imaging-desaturate 134.929+-10.162 ? 135.242+-7.073 ?
imaging-gaussian-blur 435.109+-11.139 429.545+-5.707 might be 1.0130x faster
json-parse-financial 65.548+-0.836 64.649+-0.292 might be 1.0139x faster
json-stringify-tinderbox 90.412+-1.146 ? 91.090+-2.671 ?
stanford-crypto-aes 103.536+-4.300 100.444+-2.362 might be 1.0308x faster
stanford-crypto-ccm 101.851+-2.428 ? 109.620+-11.114 ? might be 1.0763x slower
stanford-crypto-pbkdf2 227.351+-5.124 ? 232.381+-7.821 ? might be 1.0221x slower
stanford-crypto-sha256-iterative 112.346+-3.080 ? 115.008+-5.232 ? might be 1.0237x slower
<arithmetic> * 200.948+-1.875 ? 201.294+-1.965 ? might be 1.0017x slower
<geometric> 171.342+-1.339 ? 172.347+-1.829 ? might be 1.0059x slower
<harmonic> 146.649+-1.118 ? 147.637+-1.612 ? might be 1.0067x slower
Conf#1 Conf#2
JSBench:
amazon 7.0833+-0.1834 ? 7.1667+-0.2473 ? might be 1.0118x slower
facebook 33.9167+-1.0302 ? 37.0000+-4.2579 ? might be 1.0909x slower
google 71.1667+-2.4806 70.6667+-2.5027
twitter 9.0833+-0.5038 ? 9.1667+-0.4560 ?
yahoo 3.1667+-0.3668 3.0833+-0.1834 might be 1.0270x faster
<arithmetic> * 24.8833+-0.6928 ? 25.4167+-0.8694 ? might be 1.0214x slower
<geometric> 13.7106+-0.5019 ? 13.9141+-0.4369 ? might be 1.0148x slower
<harmonic> 8.1266+-0.5605 8.1232+-0.3503 might be 1.0004x faster
Conf#1 Conf#2
JSRegress:
adapt-to-double-divide 24.4981+-0.3042 24.3621+-0.0820
aliased-arguments-getbyval 0.9802+-0.0158 ? 0.9812+-0.0154 ?
allocate-big-object 3.6635+-1.3319 3.5941+-1.2134 might be 1.0193x faster
arity-mismatch-inlining 0.8205+-0.0186 ? 0.8574+-0.0579 ? might be 1.0450x slower
array-access-polymorphic-structure 7.5493+-2.0394 7.3364+-1.6780 might be 1.0290x faster
array-nonarray-polymorhpic-access 50.8719+-1.7204 49.8353+-0.4917 might be 1.0208x faster
array-with-double-add 5.3352+-0.5350 5.1005+-0.0788 might be 1.0460x faster
array-with-double-increment 3.9475+-0.0510 ? 4.2140+-0.3713 ? might be 1.0675x slower
array-with-double-mul-add 6.0992+-0.4574 6.0166+-0.3651 might be 1.0137x faster
array-with-double-sum 5.5015+-0.3060 5.3799+-0.1932 might be 1.0226x faster
array-with-int32-add-sub 9.5186+-2.0535 8.1338+-0.0553 might be 1.1703x faster
array-with-int32-or-double-sum 5.3892+-0.0347 ? 5.3901+-0.0285 ?
big-int-mul 4.6950+-0.0352 ? 4.8064+-0.1827 ? might be 1.0237x slower
boolean-test 4.0313+-0.1196 4.0025+-0.1121
branch-fold 4.8506+-0.0424 ? 4.8877+-0.1009 ?
cast-int-to-double 13.6058+-0.6921 13.3530+-0.2281 might be 1.0189x faster
cell-argument 14.2385+-0.0767 ? 14.4229+-0.2273 ? might be 1.0129x slower
cfg-simplify 3.5932+-0.1929 3.4482+-0.0562 might be 1.0420x faster
cmpeq-obj-to-obj-other 10.7661+-0.0708 10.5953+-0.2454 might be 1.0161x faster
constant-test 6.0606+-0.0282 ? 6.0701+-0.0352 ?
direct-arguments-getbyval 0.9072+-0.0187 ? 0.9329+-0.0328 ? might be 1.0283x slower
double-pollution-getbyval 11.4829+-0.0643 ? 11.5830+-0.1525 ?
double-pollution-putbyoffset 5.0162+-0.5214 5.0051+-0.5427
empty-string-plus-int 12.1300+-0.9039 ? 12.3086+-1.0509 ? might be 1.0147x slower
external-arguments-getbyval 2.5260+-0.1473 ? 2.7104+-0.4792 ? might be 1.0730x slower
external-arguments-putbyval 3.8178+-0.1935 ? 3.9242+-0.2326 ? might be 1.0279x slower
Float32Array-matrix-mult 15.6663+-1.5915 ? 18.6121+-3.3202 ? might be 1.1880x slower
fold-double-to-int 18.1065+-0.1877 18.0424+-0.1236
function-dot-apply 2.9837+-0.0239 ? 3.0100+-0.0298 ?
function-test 4.2928+-0.2268 4.2319+-0.0461 might be 1.0144x faster
get-by-id-chain-from-try-block 5.8949+-0.0477 ? 6.2228+-0.5979 ? might be 1.0556x slower
HashMap-put-get-iterate-keys 55.5120+-1.5699 ? 55.9433+-1.5649 ?
HashMap-put-get-iterate 62.8880+-0.4815 ? 65.8149+-4.6556 ? might be 1.0465x slower
HashMap-string-put-get-iterate 64.7048+-2.3368 64.2691+-1.5881
imul-double-only 15.9353+-1.1570 15.7084+-0.6294 might be 1.0144x faster
imul-int-only 14.7803+-0.0878 14.7587+-0.0515
imul-mixed 19.4359+-0.2574 ? 20.1313+-1.0006 ? might be 1.0358x slower
indexed-properties-in-objects 4.1231+-0.2960 3.9514+-0.0195 might be 1.0435x faster
inline-arguments-access 1.2902+-0.0321 1.2703+-0.0235 might be 1.0157x faster
inline-arguments-local-escape 22.0919+-1.0350 21.7939+-0.0939 might be 1.0137x faster
inline-get-scoped-var 5.9597+-0.0342 ? 6.0010+-0.0360 ?
inlined-put-by-id-transition 12.0790+-0.7788 11.7384+-0.1028 might be 1.0290x faster
int-or-other-abs-then-get-by-val 8.1689+-0.3647 8.0608+-0.0552 might be 1.0134x faster
int-or-other-abs-zero-then-get-by-val 29.9719+-1.1963 29.0644+-0.1136 might be 1.0312x faster
int-or-other-add-then-get-by-val 10.1874+-0.1153 ? 10.5899+-0.9634 ? might be 1.0395x slower
int-or-other-add 9.4850+-0.8575 9.4107+-0.5230
int-or-other-div-then-get-by-val 6.9176+-0.0707 ? 7.1647+-0.4997 ? might be 1.0357x slower
int-or-other-max-then-get-by-val 8.4815+-0.2117 ? 8.4913+-0.2887 ?
int-or-other-min-then-get-by-val 9.1959+-1.4464 8.5348+-0.6516 might be 1.0775x faster
int-or-other-mod-then-get-by-val 6.8114+-0.4811 6.4590+-0.0353 might be 1.0546x faster
int-or-other-mul-then-get-by-val 7.0799+-0.1255 ? 7.1302+-0.2599 ?
int-or-other-neg-then-get-by-val 7.5015+-0.6654 7.2540+-0.0776 might be 1.0341x faster
int-or-other-neg-zero-then-get-by-val 29.5982+-1.4961 28.4331+-0.4035 might be 1.0410x faster
int-or-other-sub-then-get-by-val 11.5071+-1.8923 10.5830+-0.9673 might be 1.0873x faster
int-or-other-sub 6.8960+-0.4853 6.6636+-0.0437 might be 1.0349x faster
int-overflow-local 10.0614+-0.0387 ? 10.0870+-0.0467 ?
Int16Array-bubble-sort 64.0267+-1.7348 ? 64.0355+-1.6873 ?
Int16Array-load-int-mul 1.9159+-0.0303 ? 1.9714+-0.0422 ? might be 1.0289x slower
Int8Array-load 5.3784+-0.4325 5.1928+-0.0490 might be 1.0357x faster
integer-divide 13.7137+-0.0474 ? 13.9176+-0.4366 ? might be 1.0149x slower
integer-modulo 2.0260+-0.0226 ? 2.0731+-0.0587 ? might be 1.0233x slower
make-indexed-storage 4.0773+-0.8530 3.9300+-0.5219 might be 1.0375x faster
method-on-number 22.0968+-1.7866 21.3596+-0.1724 might be 1.0345x faster
negative-zero-divide 0.5120+-0.0481 0.4863+-0.0240 might be 1.0528x faster
negative-zero-modulo 0.4487+-0.0139 ? 0.4637+-0.0112 ? might be 1.0334x slower
negative-zero-negate 0.4389+-0.0144 ? 0.4688+-0.0480 ? might be 1.0680x slower
nested-function-parsing-random 355.5492+-15.9494 354.5327+-17.1234
nested-function-parsing 46.3173+-4.9236 44.3146+-3.9065 might be 1.0452x faster
new-array-buffer-dead 3.8880+-0.1301 ? 3.9833+-0.1497 ? might be 1.0245x slower
new-array-buffer-push 11.5474+-2.3144 ? 13.3346+-3.2970 ? might be 1.1548x slower
new-array-dead 29.6316+-0.5554 ? 29.6685+-0.0552 ?
new-array-push 10.1692+-1.7894 ? 10.4871+-1.7946 ? might be 1.0313x slower
number-test 3.9517+-0.1138 3.9458+-0.1358
object-closure-call 7.2565+-0.1904 ? 7.2631+-0.1900 ?
object-test 4.2993+-0.1309 ? 4.3260+-0.1457 ?
poly-stricteq 93.0709+-5.3986 91.4283+-2.3041 might be 1.0180x faster
polymorphic-structure 18.5463+-1.0348 18.5009+-1.1176
polyvariant-monomorphic-get-by-id 10.0098+-0.0810 ? 10.0269+-0.0793 ?
rare-osr-exit-on-local 19.1975+-0.0708 ? 19.8140+-1.2345 ? might be 1.0321x slower
register-pressure-from-osr 30.4913+-2.7568 30.3046+-1.4490
simple-activation-demo 37.0251+-3.5050 34.0520+-0.3040 might be 1.0873x faster
slow-array-profile-convergence 4.2671+-0.1819 ? 4.2978+-0.2148 ?
slow-convergence 3.2819+-0.0640 ? 3.3907+-0.1368 ? might be 1.0332x slower
sparse-conditional 1.3012+-0.1137 1.2396+-0.0321 might be 1.0497x faster
splice-to-remove 37.6768+-1.3087 37.5877+-1.3138
string-concat-object 2.7921+-0.1007 2.7823+-0.0382
string-concat-pair-object 2.8962+-0.3174 2.7608+-0.0660 might be 1.0490x faster
string-concat-pair-simple 13.9999+-0.3431 13.9579+-0.3585
string-concat-simple 15.4469+-1.5193 15.0863+-1.6582 might be 1.0239x faster
string-cons-repeat 11.9592+-0.6915 ? 12.0810+-0.8834 ? might be 1.0102x slower
string-cons-tower 33.1878+-20.2314 32.1794+-19.6571 might be 1.0313x faster
string-equality 44.6222+-0.1467 ? 47.2120+-3.2083 ? might be 1.0580x slower
string-hash 2.7266+-0.1967 ? 2.7935+-0.1490 ? might be 1.0245x slower
string-repeat-arith 43.0047+-5.4157 41.0725+-1.3655 might be 1.0470x faster
string-sub 84.7998+-6.9775 84.6552+-4.0052
string-test 3.6161+-0.0614 ? 3.7535+-0.1796 ? might be 1.0380x slower
structure-hoist-over-transitions 3.4519+-0.5379 ? 3.5229+-0.5868 ? might be 1.0206x slower
tear-off-arguments-simple 1.7267+-0.0272 1.7046+-0.0285 might be 1.0129x faster
tear-off-arguments 3.1773+-0.2768 3.0225+-0.0249 might be 1.0512x faster
temporal-structure 19.1003+-0.7587 18.8324+-0.2254 might be 1.0142x faster
to-int32-boolean 24.9396+-1.7310 23.8502+-0.8773 might be 1.0457x faster
undefined-test 3.9230+-0.1039 3.9185+-0.1083
<arithmetic> 18.3038+-0.4438 18.2182+-0.3072 might be 1.0047x faster
<geometric> * 8.3319+-0.1258 8.3222+-0.1035 might be 1.0012x faster
<harmonic> 4.0112+-0.0335 ? 4.0370+-0.0337 ? might be 1.0064x slower
Conf#1 Conf#2
DSP:
filtrr-posterize-tint 46.0693+-0.9292 ? 47.6643+-1.9318 ? might be 1.0346x slower
filtrr-tint-contrast-sat-bright 65.6808+-1.9887 ? 66.9988+-3.1196 ? might be 1.0201x slower
filtrr-tint-sat-adj-contr-mult 77.7575+-3.2348 74.7756+-2.0677 might be 1.0399x faster
filtrr-blur-overlay-sat-contr 193.0435+-3.7883 192.0557+-1.8926
filtrr-sat-blur-mult-sharpen-contr 224.4384+-5.0942 ? 232.8045+-12.2815 ? might be 1.0373x slower
filtrr-sepia-bias 35.0078+-3.8666 33.2419+-1.3235 might be 1.0531x faster
route9-vp8 x5 1005.5667+-6.9765 ? 1018.4940+-13.9018 ? might be 1.0129x slower
starfield x5 1174.4776+-5.5371 1168.9744+-5.1948
bellard-jslinux x5 3039.2500+-28.2983 3024.0000+-15.6925
zynaps-quake3 x5 1136.2288+-11.8573 ? 1139.0970+-11.1175 ?
zynaps-mandelbrot x5 1028.6639+-6.8603 ? 1031.6522+-7.2681 ?
ammojs-asm-js x5 250.7458+-18.2217 245.5918+-12.5175 might be 1.0210x faster
ammojs-regular-js x5 255.2495+-13.0212 253.1553+-13.0909
<arithmetic> 977.8758+-4.2110 976.8870+-4.2980 might be 1.0010x faster
<geometric> * 592.3372+-9.4488 591.0040+-7.4361 might be 1.0023x faster
<harmonic> 276.4239+-9.7169 274.4566+-6.8077 might be 1.0072x faster
Conf#1 Conf#2
All benchmarks:
<arithmetic> 210.7836+-0.8557 210.6037+-0.9630 might be 1.0009x faster
<geometric> 22.5198+-0.2050 ? 22.5206+-0.2023 ? might be 1.0000x slower
<harmonic> 4.0362+-0.0222 ? 4.0606+-0.0202 ? might be 1.0060x slower
Conf#1 Conf#2
Geomean of preferred means:
<scaled-result> 36.7644+-0.2487 ? 36.8982+-0.2608 ? might be 1.0036x slower
$
=== END =====================================
Once again, the above results are preliminary. I still need to clean up and refactor the fix a bit before it's ready for review.
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