The blower, "barrell filter", in itself, does not introduce noticeable resistance... if it's sized properly. (In other words, if it has a 2" pipe thread for a #33 blower, a 2.5" pipe size for a #36 or #45, a 3" for a #47, etc...).
Where resistance comes in, is if the filter isn't kept clean.
So, the question you asked, you, yourself have and control the answer to...
Assuming that it's sized properly, are you keeping it clean...?