load is slow.

[ka7]

loading thousands of lines using ipset is slow.

• method described here. https://n0dy.com/blog/2013/05/19/faster-ipset-loading/
• parallelize load, eg. one sub-task per config-file/country

[ka7]

write a fresh "save" file, load via "restore"
https://confluence.jaytaala.com/display/TKB/Using+ipset+to+block+IP+addresses+-+firewall
syntax seems to be easy, its fast(er)