Michael Gaskill mgaskill
mgaskill
/ benchmark-formula.rb
Last active
May 23, 2016 05:41
Ruby benchmark program for a simple two-operand, one operator expression parser
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| require 'benchmark' | |
| def match_gaskill(formula) | |
| return [] unless (match = formula.match(/^\s*(-?\d+(?:\.\d+)?)\s*([+\/*-])\s*(-?\d+(?:\.\d+)?)\s*$/)) | |
| return [match[1].to_f, match[2], match[3].to_f] | |
| end | |
| def match_sweaver(formula) | |
| return [] unless (match = formula.match(/(?<operand1>(?:\d+(?:\.\d+)?)|(?:\.\d+))\s*(?<operator>[+\/*-])\s*(?<operand2>(?:\d+(?:\.\d+)?)|(?:\.\d+))/)) | |
| return [match[1].to_f, match[2], match[3].to_f] |
mgaskill
/ gist:4577a6caea7a100f780b56f7a8364e6b
Last active
May 17, 2016 21:44
Results from benchmark of Ruby nil checks
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| ruby 2.2.5p319 (2016-04-26 revision 54774) [x86_64-darwin14] | |
| ============================================================ | |
| Running tests for obj = 1000000 (Fixnum) | |
| user system total real | |
| obj: 0.970000 0.000000 0.970000 ( 0.987204) | |
| nil_obj: 0.980000 0.010000 0.990000 ( 0.980796) | |
| obj.nil?: 1.250000 0.000000 1.250000 ( 1.268564) | |
| nil_obj.nil?: 1.280000 0.000000 1.280000 ( 1.287800) | |
| !obj: 1.050000 0.000000 1.050000 ( 1.064061) | |
| !nil_obj: 1.070000 0.000000 1.070000 ( 1.170393) |