benchit.rb

require 'epitools'
str = "asdlfkjasGdlCfjasdflkjsafAjkhweDrkjThawerlkajhsdfkljhasdfACTG"* 10000

bench(
  tr:    proc{ str.tr('^ACTG', '') },
  gsub:  proc{ str.gsub(/[^ACTG]+/, '') },
  gsub2: proc{ str.gsub(/[^ACTG]/, '') },
  scan:  proc{ str.scan(/[ACTG]/).join },
  scan2: proc{ str.scan(/[ACTG]+/).join }
)

# ==============
# OUTPUT:
# ==============
#
# * Benchmarking 100 iterations...
#             user     system      total        real
# tr      0.060000   0.000000   0.060000 (  0.067188)
# gsub    1.390000   0.010000   1.400000 (  1.397851)
# gsub2   7.040000   0.000000   7.040000 (  7.035661)
# scan    2.060000   0.000000   2.060000 (  2.054325)
# scan2   1.840000   0.000000   1.840000 (  1.834801)

>> bench(
 |   tr:    proc{ str.tr('^ACTG', '') },
 |   gsub:  proc { str.gsub(/[^ACTG]+/, '') },
 |   gsub2: proc { str.gsub(/[^ACTG]/, '') },
 |   scan:  proc{ str.scan(/[ACTG]/).join },
 |   scan2: proc{ str.scan(/[ACTG]+/).join },
 |   delete: proc { str.delete('^ACTG') }
 | )
* Benchmarking 100 iterations...
Rehearsal ------------------------------------------
tr       0.130000   0.010000   0.140000 (  0.144685)
gsub     1.940000   0.020000   1.960000 (  1.962563)
gsub2   10.170000   0.030000  10.200000 ( 10.208400)
scan     2.720000   0.060000   2.780000 (  2.791901)
scan2    2.400000   0.040000   2.440000 (  2.442949)
delete   0.120000   0.020000   0.140000 (  0.138591)
-------------------------------- total: 17.660000sec

             user     system      total        real
tr       0.120000   0.020000   0.140000 (  0.130412)
gsub     2.010000   0.010000   2.020000 (  2.023951)
gsub2   10.790000   0.050000  10.840000 ( 10.859402)
scan     2.760000   0.050000   2.810000 (  2.818731)
scan2    2.480000   0.040000   2.520000 (  2.527159)
delete   0.120000   0.010000   0.130000 (  0.137463)