Summary: Replace array of ArrayList of BigIntegers with a volatile two-dimensional BigInteger array eliminate the synchronization of getRadixConversionCache()
Reviewed-by: plevart, shade, bpb, alanb
Contributed-by: NPeter Levart &lt;peter.levart@gmail.com&gt;, Dmitry Nadezhin &lt;dmitry.nadezhin@oracle.com&gt;, Aleksey Shipilev <aleksey.shipilev@oracle.com>