$ for i in hallo hallo2 hallo3; do echo -n "$i: "; ab -q -n 1000 -c 10 http://localhost/$i.pl|grep "Requests per"; done
hallo: Requests per second:    639.46 [#/sec] (mean)
hallo2: Requests per second:    440.15 [#/sec] (mean)
hallo3: Requests per second:    437.97 [#/sec] (mean)

$ for i in hallo hallo2 hallo3; do echo -n "$i: "; ab -q -n 1000 -c 10 http://localhost/$i.pl|grep "Requests per"; done
hallo: Requests per second:    1676.77 [#/sec] (mean)
hallo2: Requests per second:    933.17 [#/sec] (mean)
hallo3: Requests per second:    463.16 [#/sec] (mean)

$ for i in hallo hallo2 hallo3; do echo -n "$i: "; ab -q -n 1000 -c 10 http://localhost/$i.pl|grep "Requests per"; done
hallo: Requests per second:    547.29 [#/sec] (mean)
hallo2: Requests per second:    436.82 [#/sec] (mean)
hallo3: Requests per second:    374.33 [#/sec] (mean)

$ for i in hallo hallo2 hallo3; do echo -n "$i: "; ab -q -n 1000 -c 10 http://localhost/$i.pl|grep "Requests per"; done
hallo: Requests per second:    444.90 [#/sec] (mean)
hallo2: Requests per second:    714.87 [#/sec] (mean)
hallo3: Requests per second:    379.99 [#/sec] (mean)