Resource Times:

Date / Time: 01/28/08 11:14:04


See the solver return definitions for optimal/feasible model and solve statuses. Solutions are not checked for how close they are to eachother. Resource times are considered the same, if they are within 10% of eachother. A solver is considered faster than another, if it is less than 50% faster than the other. A solver is considered much faster than another, if it is more than 50% faster than the other.

If a model was not solved optimal/feasible by both solvers, the resource time is considered the same. If a model was solved optimal/feasible by solver A but not by solver B, then solver A is considered infinitely faster than solver B. Similarly, if one solver has trace data and the other has no data, then the first solver is consideredinfinitely faster.

A solver is considered to have a better objective function value, if the relative objective value difference is greater than 1.00E-05 For objective values below 1e-1 we use absolute differences.

Tracefile 1 :1-CBC2004.trc
Tracefile 2 :5-IPOPT2008.trc
Solvers used : CBC2004
IPOPT2008
Modeltype(s)   LP
Threshold: Solver Faster 10%
Threshold: Solver Much Faster 50%
Threshold: Solver Infinitely Faster Other solver failed


Total Obj CBC2004 better Obj same Obj IPOPT2008 better
Solver CBC2004 infinitely faster : 10 10 - -
Solver CBC2004 much faster : 49 5 44 -
Solver CBC2004 faster : 11 - 11 -
Solvers perform the same : 7 1 6 -
Solver IPOPT2008 faster : 11 - 11 -
Solver IPOPT2008 much faster : 10 - 9 1
Solver IPOPT2008 infinitely faster : 8 - - 8
Both solvers failed to solve optimally : 14 - 14 -
Total models: : 12016959




Solver return definition:

OutcomeModel StatusSolver Status
globally optimal 1 or 15 1
locally optimal/feasible 2 or 7 or 16 or 17 1 or 2 or 3 or 4 or 5




Resource Times:

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Solver CBC2004 infinitely faster - Obj of CBC2004 better:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
pds-063.8800fail -- 2.77610376E+10 2.28359671E+10
pds-1016.3000fail -- 2.67270950E+10 2.11376299E+09
cre-b101.5700fail -- 2.31296399E+07 2.31299404E+07
fome20201.5600fail -- 2.38216586E+10 2.38218707E+10
fome21458.8000fail -- 4.73463189E+10 4.74113316E+10
pds-20187.4400fail -- 2.38216586E+10 2.38220039E+10
pds-30683.4400fail -- 2.13854457E+10 2.13329680E+10
pds-401267.7100fail -- 1.88551988E+10 1.61452480E+10
pds-501777.9000fail -- 1.66035257E+10 8.96843273E+09
pds-602534.8000fail -- 1.42659044E+10 NA

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Solver CBC2004 much faster - Obj of CBC2004 better:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
fome110.0800496.52000.000 0.00000000E+00 2.57147096E-02
fome120.15001012.50000.000 0.00000000E+00 5.14294193E-02
lpl311.31003825.66000.003 2.73180000E+04 4.21323465E+04
fome130.31002111.08000.000 0.00000000E+00 1.02858839E-01
watson_11739.35003972.52000.438 -1.60928078E+03 -1.58614353E+03

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Solver CBC2004 much faster - Obj same for both solvers:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
aa014.840014.47000.334 5.55354364E+04 5.55354364E+04
aa032.29009.02000.254 4.96163636E+04 4.96163636E+04
air020.07002.52000.028 7.64000000E+03 7.64000001E+03
air062.29009.14000.251 4.96163636E+04 4.96163636E+04
baxter12.440083.26000.149 5.60072557E+07 5.60072557E+07
cari0.210015.92000.013 5.81893058E+02 5.81893058E+02
crew10.41001.00000.410 2.05555556E+01 2.05555558E+01
ex3sta128.3100110.81000.255 -6.30754033E+01 -6.30754033E+01
fit2d1.50008.89000.169 -6.84642933E+04 -6.84642932E+04
ken-112.84005.72000.497 -6.97238226E+09 -6.97238226E+09
lp2270.0600312.52000.224 4.58944594E+02 4.58944669E+02
mod282.7900482.18000.172 2.77373714E+07 2.77373716E+07
model715.8800378.09000.042 4.93800855E+04 4.93800855E+04
osa-071.150027.41000.042 5.35722517E+05 5.35722517E+05
pcb30001.32003.09000.427 1.37416420E+05 1.37416431E+05
r053.170015.09000.210 5.57831859E+05 5.57831859E+05
scrs8-2r-5121.5500203.22000.008 1.07409934E+03 1.07409935E+03
scsd8-2b-640.50001.69000.296 1.59986680E+01 1.59986684E+01
scsd8-2c-640.50001.78000.281 1.49992320E+01 1.49992324E+01
scsd8-2r-1080.10001.09000.092 2.36999943E+01 2.36999945E+01
scsd8-2r-2160.38002.25000.169 2.33999840E+01 2.33999843E+01
sctap1-2b-641.47003.90000.377 4.84560000E+02 4.84560000E+02
slptsk4.520018.52000.244 2.98953660E+01 2.98953660E+01
wood1p0.14003.81000.037 1.44290241E+00 1.44290249E+00
world70.5200330.25000.214 4.03648732E+07 4.03648731E+07
bas1lp0.9100110.33000.008 3.63000000E+02 3.63000000E+02
cre-d46.18003809.36000.012 2.44549698E+07 2.44549703E+07
ken-18149.3000578.41000.258 -5.22170253E+10 -5.22170253E+10
kl020.660019.38000.034 2.15250000E+02 2.15250000E+02
nemsemm22.380010.65000.223 5.81079571E+05 5.81079644E+05
nsct211.42001777.29000.006 -3.71750820E+07 -3.71750820E+07
osa-145.4700155.46000.035 1.10646284E+06 1.10646284E+06
osa-3034.6500621.67000.056 2.14213987E+06 2.14213987E+06
rail5168.190035.94000.228 1.82000000E+02 1.82000001E+02
rail58216.270058.81000.277 2.09712233E+02 2.09712234E+02
rlfddd0.610033.02000.018 -1.30000000E+01 -1.29999993E+01
rlfdual24.3200188.99000.129 -1.00000000E+00 -9.99999417E-01
rlfprim6.5900248.10000.027 1.00000000E+00 1.00000074E+00
route1.240018.68000.066 5.94165028E+03 5.94165028E+03
scsd8-2r-4321.17005.10000.229 2.57999697E+01 2.57999725E+01
us040.550031.61000.017 1.77316667E+04 1.77316667E+04
nemsemm15.640074.83000.075 5.12959601E+05 5.12959684E+05
nw141.6500759.77000.002 6.18440000E+04 6.18440001E+04
self17.8300418.54000.043 0.00000000E+00 2.08140901E-10

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Solver CBC2004 faster - Obj same for both solvers:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
car42.19002.47000.887 3.54603702E+01 3.54603861E+01
co58.330011.82000.705 7.14469554E+05 7.14469563E+05
co947.040066.23000.710 9.46920430E+05 9.46920431E+05
cq54.94008.30000.595 4.00133807E+05 4.00133852E+05
cq932.720055.83000.586 5.05541710E+05 5.05541710E+05
jendrec13.64005.37000.678 7.02846050E+03 7.02846052E+03
p0105.63006.67000.844 1.11504792E+06 1.11504792E+06
p051.70002.82000.603 5.56000277E+05 5.56000277E+05
pilot8762.8800100.28000.627 3.01710347E+02 3.01713357E+02
rosen100.96001.34000.716 -1.74215456E+05 -1.74215456E+05
rail50721.850040.44000.540 1.72145567E+02 1.72145567E+02

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Solvers perform the same - Obj of CBC2004 better:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
model113.97003.84001.034 0.00000000E+00 1.02089865E-03

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Solvers perform the same - Obj same for both solvers:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
aa30.00000.0000--- 0.00000000E+00 0.00000000E+00
aa40.00000.0000--- 0.00000000E+00 0.00000000E+00
aa50.00000.0000--- 0.00000000E+00 0.00000000E+00
aa60.00000.0000--- 0.00000000E+00 0.00000000E+00
ken-1311.150012.19000.915 -1.02573948E+10 -1.02573948E+10
model516.310016.59000.983 -8.58440729E+05 -8.58440713E+05

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Solver IPOPT2008 faster - Obj same for both solvers:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
gen119.280014.46001.333 5.20042799E-07 1.64555231E-06
gen473.620039.94001.843 1.32852119E-06 9.34175517E-06
maros-r744.710036.65001.220 1.49718517E+06 1.49718517E+06
model10344.9900253.08001.363 -1.54599570E+05 -1.54599602E+05
model95.40004.20001.286 -1.41123091E+05 -1.41123078E+05
nemswrld166.8100133.05001.254 2.60308966E+02 2.60309062E+02
rat577.010055.04001.399 3.08370701E+06 3.08370701E+06
scfxm1-2b-6414.63007.42001.972 2.87756386E+03 2.87756386E+03
scfxm1-2r-643.52002.72001.294 2.87756386E+03 2.87756386E+03
scfxm1-2r-968.87005.24001.693 2.89170611E+03 2.89170612E+03
t0331-4l71.760049.85001.440 2.97300334E+04 2.97300334E+04

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Solver IPOPT2008 much faster - Obj same for both solvers:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
fit2p9.50001.64005.793 6.84642933E+04 6.84642933E+04
gen270.630023.09003.059 3.29279078E+00 3.29279078E+00
nemspmm114.70003.48004.224 -3.27415836E+05 -3.27415836E+05
nemspmm216.51005.91002.794 -2.91794836E+05 -2.91794828E+05
rat1127.600062.00002.058 1.99953166E+06 1.99953166E+06
south3170.36006.480010.858 1.81894020E+09 1.81894020E+09
stocfor311.83004.46002.652 -3.99767839E+04 -3.99767839E+04
testbig5.74002.41002.382 -6.04229607E+01 -6.04229605E+01
rat7a413.1700160.20002.579 2.07437142E+06 2.07437142E+06

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Solver IPOPT2008 much faster - Obj of IPOPT2008 better:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
l3037.49002.730013.733 9.52661199E-01 9.52179223E-01

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Solver IPOPT2008 infinitely faster - Obj of IPOPT2008 better:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
nsir1infeasible 58.4900 -- -3.15035900E+07 -2.89090330E+07
nsir2infeasible 18.8000 -- -2.88980360E+07 -2.71755935E+07
nug15infeasible 3640.1900 -- 8.62786712E+02 1.04099790E+03
qap15infeasible 3748.4000 -- 8.35443283E+02 1.04099451E+03
ulevimininfeasible 149.3700 -- -5.19198575E+09 -5.19110186E+09
dbic1infeasible 3290.6800 -- -1.00000000E+20 -9.76897300E+06
dbir2infeasible 637.7000 -- -6.65951550E+06 -6.11691650E+06
rail4284fail 7231.9500 -- NA 2.11919800E+07

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Both solvers failed to solve optimally - Obj same for both solvers:

Modelname Time (CBC2004) Time (IPOPT2008) Ratio (CBC2004 / IPOPT2008) Obj (CBC2004) Obj (IPOPT2008)
bgindyinfeasible fail -- 9.55484000E+06 6.13151538E+17
goshinfeasible fail -- 2.35994385E+02 7.07682701E+14
lpl1infeasible fail -- 2.84200000E+06 4.12249696E+12
nsct1infeasible fail -- -3.90925630E+07 -2.20578599E+07
nug20infeasible fail -- 8.96328302E+02 1.06509674E+07
sgpf5y6infeasible fail -- 1.21116221E+06 NA
dbir1infeasible fail -- -8.10266600E+06 -8.10705967E+06
nug30fail fail -- NA NA
osa-60fail fail -- NA 5.68360517E+09
pds-100fail fail -- NA 8.08778775E+08
pds-70fail fail -- NA 3.71765814E+09
pds-80fail fail -- NA NA
pds-90fail fail -- NA NA
rail2586fail fail -- NA NA

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