[poppler] Doubts with poppler

[John]

Hello everybody,

I just use poppler in my embedded system with Qt embedded and it works fine.
But there is something strange, if I open pdf files with a lot of 
pictures, the cpu usage go up to 100% for several seconds(some times, 
more than 20 seconds) .
My system is:
Geode LX 500Mhz
2.6.24.7-rt26
Qt embedded 4.5.0

is it normal??
Can I avoid this behaviour??

Best regards