Shell Programming and Scripting

user="joe"
phone="4280919"
duration=128
login=12/02/2016
ip-address=10.230.120.35

user="mary"
phone="6352728"
duration=23
login=16/02/2016
ip-address=10.123.231.54

user,phone,duration,ip-address
joe,4280919,128,10.230.120.35
mary,6352728,23,10.123.231.54

$AWK 'BEGIN {
  RS="" ; FS="\n"
  print "user,phone,duration,ip-address";
}
{delete usr; delete ph; delete dur; delete ip;
 for (i=1; i<= NF; i++) {
   if ($i ~"user") {split ($i,usr,"=");gsub("\"","",usr[2]); };
   if ($i ~"phone") {split ($i,ph,"=");gsub("\"","",ph[2]); };
   if ($i ~"duration") {split ($i,dur,"=") ; };
   if ($i ~"ip-address") {split ($i,ip,"="); };
}
printf("%s,%s,%s,%s,\n",usr[2],ph[2],dur[2],ip[2]);
}' infile

awk -F"=" '/^user/ && A{A=A ORS;B=""} {B=B?B OFS $1:$1;gsub(/\"/,X,$NF);A=A?A OFS $NF:$NF;} END{sub(/\n\,/,"\n",A);print B ORS A}' OFS=,   Input_file

user,phone,duration,login,ip-address
joe,4280919,128,12/02/2016,10.230.120.35
mary,6352728,23,16/02/2016,10.123.231.54

awk -F"=" '/^login/{next} /^user/ && A{A=A ORS;B=""}{B=B?B OFS $1:$1;gsub(/\"/,X,$NF);A=A?A OFS $NF:$NF;} END{sub(/\n\,/,"\n",A);print B ORS A}' OFS=,   Input_file

user,phone,duration,ip-address
joe,4280919,128,10.230.120.35
mary,6352728,23,10.123.231.54

sed -i 's/"//g' file

awk 'BEGIN{print "user,phone,duration,login,ip_address";RS="";OFS=",";FS="="}  { print $2 OFS $4 OFS $6 OFS $8 OFS $10}' file

awk 'FNR==1{print $1,$3,$5,$9}{print $2,$4,$6,$10}' FS='[="\n]*' OFS=, RS=

user,phone,duration,ip-address
joe,4280919,128,10.230.120.35
mary,6352728,23,10.123.231.54

Original solution post #1                      : 10 seconds
This suggestion                                : 2.5 seconds
Looneys suggestion with sed and awk combined   : 3 seconds
Ravinder's suggestion in post #4               : > 240 seconds before I broke it off (it also used a lot of memory and it produced extra commas at the start or the end)