useRegex finds 2048 matches 
useRegex2 finds 2048 matches 
useIndex finds 2048 matches 
            Rate  useRegex useRegex2  useIndex
useRegex  71.6/s        --       -9%      -76%
useRegex2 78.4/s       10%        --      -74%
useIndex   299/s      318%      281%        --