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Description of problem:
firewall-cmd very slow when loading large XML files

Version-Release number of selected component (if applicable):
firewalld-0.4.3.2-8.1.el7_3.noarch

How reproducible:
Always, when loading large XML files, in our case about 61.000 lines

Steps to Reproduce:
1. firewall-cmd --permanent --ipset=$IPSETNAME --add-entries-from-file=$IPSET takes 76 seconds.
2. firewall-cmd --reload takes 59 seconds. 

Actual results:
Operation takes about 1 minute or more

Expected results:
Operation should complete within 1-2 seconds

Additional info:
Large XML files seems to be the cause of the slow response.

Upstream fixes:
https://github.com/t-woerner/firewalld/commit/e9e1e347e3f9fea699878fe8d480b7ea6efff91f
https://github.com/t-woerner/firewalld/commit/c6fe89e8f1c99c0a22d705e56d078878dee437a8
https://github.com/t-woerner/firewalld/commit/8a4dde367d8cd1b773e4e2e44f655839e80d4816
https://github.com/t-woerner/firewalld/commit/e61f9286e0f8eb53026755554b2278b27b7aed34

verified firewalld-0.4.4.4-5.el7 on x86_64

wc -l /mnt/tests/firewalld/ipset.list 
65025 /mnt/tests/firewalld/ipset.list

new:
time firewall-cmd --permanent --ipset myipset --add-entries-from-file /mnt/tests/firewalld/ipset.list 
success

real	0m1.261s
user	0m0.212s
sys	0m0.019s

time systemctl restart firewalld
real	0m0.937s
user	0m0.006s
sys	0m0.009s

old:
success
time firewall-cmd --permanent --ipset myipset --add-entries-from-file /mnt/tests/firewalld/ipset.list 
success

real	1m1.335s
user	1m0.332s
sys	0m0.018s
[root@vm-rhel7s ~]# time systemctl restart firewalld
real	0m45.240s
user	0m0.006s
sys	0m0.002s

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:1934