xpress and cplex runtime comparison results vince ,
fyi
below is the comparison of the computation time results from cplex and xpress
optimization softwares .
- chonawee
- - - - - - - - - - - - - - - - - - - - - - forwarded by chonawee supatgiat / corp / enron on
05 / 19 / 2000 03 : 26 pm - - - - - - - - - - - - - - - - - - - - - - - - - - -
chonawee supatgiat
05 / 17 / 2000 05 : 48 pm
to : samer _ takriti @ enron . net , stinson gibner / hou / ect @ ect , ravi
thuraisingham / enron communications @ enron communications
cc : tom halliburton / corp / enron @ enron , pinnamaneni krishnarao / hou / ect @ ect ,
ming - lung . lee @ sycamorenet . com , ming 888 lee @ aol . com
subject : xpress and cplex runtime comparison results
hi ,
i have tested both cplex and xpress - mp optimization software in solving our
network design problem .
xpress is more user friendly hence it takes less developing time . however ,
cplex performs significantly better
in term of computation time , especially in integer programming .
as a result , eventhougth xpress is easier to use and cheaper , i would
recommend our ebs group to use cplex .
please let me know what do you think . . .
the test problem has 10 nodes , 77 cables , 5 cable speed .
the table below represents the computation time in seconds for solving this
problem .
the second column indicates if the general integer variables are relaxed ( but
still keep the binary variables ) .
the " lp " column represents the computational time when solving relaxed
problem ( no binary & integer variable constraints ) .
xpress took too much time in solving case 4 and 6 so i had to stop the
process and report the best solutions it found .
below are the graph .
xpress and cplex runtime comparison results
vince ,
fyi
below is the comparison of the computation time results from cplex and xpress
optimization softwares .
- chonawee
- - - - - - - - - - - - - - - - - - - - - - forwarded by chonawee supatgiat / corp / enron on
05 / 19 / 2000 03 : 26 pm - - - - - - - - - - - - - - - - - - - - - - - - - - -
chonawee supatgiat
05 / 17 / 2000 05 : 48 pm
to : samer _ takriti @ enron . net , stinson gibner / hou / ect @ ect , ravi
thuraisingham / enron communications @ enron communications
cc : tom halliburton / corp / enron @ enron , pinnamaneni krishnarao / hou / ect @ ect ,
ming - lung . lee @ sycamorenet . com , ming 888 lee @ aol . com
subject : xpress and cplex runtime comparison results
hi ,
i have tested both cplex and xpress - mp optimization software in solving our
network design problem .
xpress is more user friendly hence it takes less developing time . however ,
cplex performs significantly better
in term of computation time , especially in integer programming .
as a result , eventhougth xpress is easier to use and cheaper , i would
recommend our ebs group to use cplex .
please let me know what do you think . . .
the test problem has 10 nodes , 77 cables , 5 cable speed .
the table below represents the computation time in seconds for solving this
problem .
the second column indicates if the general integer variables are relaxed ( but
still keep the binary variables ) .
the " lp " column represents the computational time when solving relaxed
problem ( no binary & integer variable constraints ) .
xpress took too much time in solving case 4 and 6 so i had to stop the
process and report the best solutions it found .
below are the graph .