kiuma@kxps  ~  time dig $(hostname)

; <<>> DiG 9.12.0 <<>> kxps
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1392
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;kxps.				IN	A

;; ANSWER SECTION:
kxps.			0	IN	A	192.168.1.102

;; Query time: 3 msec
;; SERVER: 192.168.1.254#53(192.168.1.254)
;; WHEN: lun feb 19 09:05:57 CET 2018
;; MSG SIZE  rcvd: 38

dig $(hostname)  0,01s user 0,00s system 73% cpu 0,015 total


kiuma@kxps  ~  time  getent ahosts $(hostname)
192.168.1.102   STREAM kxps
192.168.1.102   DGRAM
192.168.1.102   RAW
fe80::6870:1592:f982:a8f6 STREAM
fe80::6870:1592:f982:a8f6 DGRAM
fe80::6870:1592:f982:a8f6 RAW
getent ahosts $(hostname)  0,00s user 0,01s system 0% cpu 20,038 total

kiuma@kxps  ~  grep ^hosts /etc/nsswitch.conf
hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname