vs.txt

     λ test: http_load -parallel 10 -seconds 5 url.txt 
15065 fetches, 10 max parallel, 75325 bytes, in 5 seconds
5 mean bytes/connection
3013 fetches/sec, 15065 bytes/sec
msecs/connect: 0.195035 mean, 8.736 max, 0.008 min
msecs/first-response: 3.02441 mean, 47.281 max, 0.445 min
HTTP response codes:
  code 200 -- 15065
     λ test: http_load -parallel 10 -seconds 5 url.txt 
4699 fetches, 10 max parallel, 23495 bytes, in 5.00008 seconds
5 mean bytes/connection
939.785 fetches/sec, 4698.93 bytes/sec
msecs/connect: 4.18351 mean, 12.475 max, 1.063 min
msecs/first-response: 4.07015 mean, 17.583 max, 1.301 min
HTTP response codes:
  code 200 -- 4699