Fix ignore handling, improve performance by compiling regexp patterns.
Fix ignore handling, improve performance by compiling regexp patterns.

sdinot/hipparchus,Hipparchus-Math/hipparchus,sdinot/hipparchus,Hipparchus-Math/hipparchus,sdinot/hipparchus,Hipparchus-Math/hipparchus,sdinot/hipparchus,Hipparchus-Math/hipparchus