master

Mac-Pro:perf cremes$ ruby array_element_deletion.rb
Rehearsal ---------------------------------------------------------
delete_at              21.628785   0.047312  21.676097 ( 22.110400)
shift test              0.000759   0.000015   0.000774 (  0.000770)
slice test              2.867763   0.002488   2.870251 (  2.877205)
----------------------------------------------- total: 24.547122sec

                            user     system      total        real
delete_at              20.203966   0.024105  20.228071 ( 20.407028)
shift test              0.000761   0.000011   0.000772 (  0.000764)
slice test              3.023781   0.005327   3.029108 (  3.107345)