Pjsip high cpu load

hi i install freepbx distro 13 and create 425 pjsip extensions with 86 calls the cpu load its 54 % but every 3 to 5 minutes the cpu load its 280% so i use ps -LlFm -p “asterisk pid” and find the thread that use more cpu then i use pstack “asterisk pid” > /tmp/asterisk.stack.txt and find this

Thread 2 (Thread 0x7fb32c92f700 (LWP 9697)):
#0 0x00007fb39e75840a in ?? () from /usr/lib64/libsqlite3.so.0
#1 0x00007fb39e7bafc7 in ?? () from /usr/lib64/libsqlite3.so.0
#2 0x00007fb39e7a2560 in sqlite3_step () from /usr/lib64/libsqlite3.so.0
#3 0x00000000004f4cf9 in ast_db_gettree ()
#4 0x00007fb32f5ca278 in ?? () from /usr/lib64/asterisk/modules/res_sorcery_astdb.so
#5 0x00000000005c05ad in ast_sorcery_retrieve_by_regex ()
#6 0x00007fb32e2bd014 in ast_sip_location_retrieve_aor_contacts () from /usr/lib64/asterisk/modules/res_pjsip.so
#7 0x00007fb32e2bd302 in ast_sip_for_each_contact () from /usr/lib64/asterisk/modules/res_pjsip.so
#8 0x00007fb32e2bbe8d in ?? () from /usr/lib64/asterisk/modules/res_pjsip.so
#9 0x00007fb32e2bc6b7 in ast_sip_for_each_aor () from /usr/lib64/asterisk/modules/res_pjsip.so
#10 0x00007fb32e2c227d in ?? () from /usr/lib64/asterisk/modules/res_pjsip.so
#11 0x00007fb32e2c599c in ?? () from /usr/lib64/asterisk/modules/res_pjsip.so
#12 0x000000000045d608 in ?? ()
#13 0x000000000045d93b in __ao2_callback ()
#14 0x00007fb32e2be223 in ast_sip_cli_traverse_objects () from /usr/lib64/asterisk/modules/res_pjsip.so
#15 0x00000000004d65fa in ast_cli_command_full ()
#16 0x000000000054662c in ?? ()
#17 0x000000000054be59 in ?? ()
#18 0x000000000054c78f in ?? ()
#19 0x000000000054cc8b in ?? ()
#20 0x00000000005dfdd1 in ?? ()
#21 0x00000000005f2314 in ?? ()
#22 0x00007fb39d69d9d1 in start_thread () from /lib64/libpthread.so.0
#23 0x00007fb39ca258fd in clone () from /lib64/libc.so.6
Thread 1 (Thread 0x7fb39f34c820 (LWP 17807)):

so i think maybe sqlite problem the i use asterik cli
in the night with no calls and make pjsip show endpoints
the cpu load went from 2 % to 84 % so i think asterisk read sqllite every x time and that make my cpu go to 280 % with 80 calls it is happening in freepbx 13 asterisk 13.5 and in another box with freepbx 12 asterisk 13.5 to please help and sorry my bad english

i solve the problem
delete all pjsip extens and create all sip and naw cpu never go more than 40 % pjsip its still an alpha module with poor eficiency i dont know if its an asterisk or freepbx problem thanks for no help at all