hg: jdk-updates/jdk13u-dev: 8229022: BufferedReader performance can be improved by using StringBuilder

[abrygin at azul.com]

Changeset: 6e8d6fca94ca
Author:    bpb
Date:      2019-10-02 07:50 -0700
URL:       https://hg.openjdk.java.net/jdk-updates/jdk13u-dev/rev/6e8d6fca94ca

8229022: BufferedReader performance can be improved by using StringBuilder
Reviewed-by: igerasim, vtewari, dfuchs
Contributed-by: snazarkin at azul.com

! src/java.base/share/classes/java/io/BufferedReader.java