If you run apg the first time, it runs *normally* fast. 
If you run it again soon, it takes up to 2 minutes.
Please look at the following output obtained with "time"

*** first run ***

# time apg -m 8 - x 8 -t

IvdivCeo (Iv-div-Ceo)
CridEsya (Crid-Es-ya)
Flojyimt (Floj-yimt)
yoghZuts (yogh-Zuts)
ViawtUk} (Vi-awt-Uk-RIGHT_BRACE)
Velwarj. (Vel-warj-PERIOD)

real	0m0.002s
user	0m0.000s
sys	0m0.000s

*** second run *** 

# time apg -m 8 - x 8 -t
fercUnIl (ferc-Un-Il)
Koyftic3 (Koyft-ic-THREE)
Mujothju (Muj-oth-ju)
miasIgty (mias-Ig-ty)
eapNalsh (eap-Nalsh)
IbUcWirg (Ib-Uc-Wirg)

real	1m22.222s
user	0m0.000s
sys	0m0.000s

As you can see the second run is few some orders of magnitute slower.

Thank you in advance for your attention

Andrea Forghieri