Running ordinary benchmark program for String#delete, String#tr, and String#gsub

gistfile1.txt

# Based on https://gist.github.com/agrimm/6144794 , but running it with TIMES = 1_000_000

$ ruby --version; time ruby delete-tr.rb ; rbenv shell 2.0.0-p247 ; ruby --version; time ruby delete-tr.rb 
rubinius 2.0.0.n213 (1.9.3 c7f6ce0a 2013-08-01 JI) [x86_64-apple-darwin10.8.0]
Rehearsal ----------------------------------------------------
delete           238.547355   0.441726 238.989081 (239.530814)
tr               239.829005   0.381523 240.210528 (240.779957)
gsub with regexp 1267.507984   7.022022 1274.530006 (1288.916921)
gsub with string 1307.494479   8.922239 1316.416718 (1353.190891)
---------------------------------------- total: 3070.146333sec

                       user     system      total        real
delete           238.610717   0.622618 239.233335 (245.259406)
tr               241.016633   0.740512 241.757145 (249.270124)
gsub with regexp 1298.327615   9.350199 1307.677814 (1357.085734)
gsub with string 1298.666943   9.370118 1308.037061 (1354.205581)

real	105m28.826s
user	102m23.508s
sys	0m45.325s
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin10.8.0]
Rehearsal ----------------------------------------------------
delete            65.950000   1.160000  67.110000 ( 67.581271)
tr                66.080000   1.050000  67.130000 ( 69.170526)
gsub with regexp 998.840000   1.930000 1000.770000 (1014.215939)
gsub with string 1009.230000   1.810000 1011.040000 (1025.894625)
---------------------------------------- total: 2146.050000sec

                       user     system      total        real
delete            66.000000   1.180000  67.180000 ( 68.054589)
tr                66.100000   1.290000  67.390000 ( 67.765937)
gsub with regexp 970.130000   1.920000 972.050000 (976.706647)
gsub with string 974.170000   1.390000 975.560000 (978.344746)

real	71m7.950s
user	70m16.549s
sys	0m11.773s