[tex-live] TeXLive 2005 is slower than TeXLive2003

[Jinsong Zhao]

Thanks to Jerzy for pointing me the program ntimer.exe 
which displays the Elapsed, Kernel, User and Idle time
of the image specified in the command line.

After run latex from TeXLive2005 and TeXLive 2003 using
the following command:

ntimer -l -f -s latex sample2e.tex

I get the following results (get with diff), it shows that
the TeXLive2005 is much slower that TeXLive2003.

Does it just because using pdfeTeXk instead of e-TeXk? 
If it's true, how to switch to e-TeXk from pdfeTeXk?

2c2
< This is pdfeTeXk, Version 3.141592-1.30.3-2.2 (Web2c 7.5.5)
---
> This is e-TeXk, Version 3.141592-2.1 (Web2c 7.5.2)
22c19
< ContextSwitches - 5300
---
> ContextSwitches - 1896
26c23
< ETime(   0:00:07.078 ) UTime(   0:00:06.750 ) KTime(   0:00:00.093 )
---
> ETime(   0:00:00.562 ) UTime(   0:00:00.484 ) KTime(   0:00:00.046 )
29,33c26,29
< Process PageFaultCount      4192
< Total Interrupts            7514
< Total Context Switches      5300
< Total System Calls          48786
< 
---
> Process PageFaultCount      2153
> Total Interrupts            600
> Total Context Switches      1896
> Total System Calls          12676