poor efficiency of Numerical Integration at 5.2.0 ?

*To*: mathgroup at smc.vnet.net*Subject*: [mg74086] poor efficiency of Numerical Integration at 5.2.0 ?*From*: "shadowfox" <ombrerenard at gmail.com>*Date*: Fri, 9 Mar 2007 02:02:42 -0500 (EST)

My system is Mandriva 2007 on K7 sempron 2500+ and I has ram about 512MB. 1. http://amd.streamload.com/sombrazorro/Hosted/z_Ds_tau_test.nb When calculating ZmDsTau[1000,1.7] and plotting ZmDsTau[en,1.7] in z_Ds_tau_test.nb, it took 138 secs and 2.3 hrs on 5.2 respectly. But in 5.0.0 it took only abot 1.5 secs and 73 secs. 2. http://amd.streamload.com/sombrazorro/Hosted/testbug.nb At version 5.2.0, it caused memory leakage (needed about 500 MB and above) and I can not got /sigma[1]. Finally, process manager killed the process. Then I got /sigma[1] in 1 secs at Version 5.0.0 . Does Anybody get the same problem? Thanks.