RFR 8208163 [lworld] performance regression on String(char[]) constructor

[Roland Westrelin]

Hi Ioi,

Thanks for working on this. In the meantime I reworked that code as part
of this:

http://mail.openjdk.java.net/pipermail/valhalla-dev/2018-September/004950.html

and that change will make your fix obsolete (I don't see a performance
regression with my patch).

Roland.