implement purify in pure bash for speed
implement purify in pure bash for speed

Asuza/App-perlbrew,rafl/App-perlbrew,ptolemarch/App-perlbrew,josl/App-perlbrew,josl/App-perlbrew,josl/App-perlbrew,calid/App-perlbrew,rafl/App-perlbrew,Asuza/App-perlbrew,Asuza/App-perlbrew,rafl/App-perlbrew,ptolemarch/App-perlbrew,ptolemarch/App-perlbrew,calid/App-perlbrew