Codereview request for 7183053: Optimize DoubleByte charset for String.getBytes()/new String(byte[])
Xueming Shen
xueming.shen at oracle.com
Tue Jul 10 23:11:10 UTC 2012
Hi,
In JDK7, the decoder and encoder implementation of most of our
single-byte charsets
and UTF-8 charset are optimized to implement the internal interfce
sun.nio.cs.ArrayDecoder/
Encoder to provide a fastpath for String.getBytes(...) and new
String(byte[]...) operations. I
have an old blog regarding this optimization at
https://blogs.oracle.com/xuemingshen/entry/faster_new_string_bytes_cs
This rfe, as the followup for above changes, is to implement
ArrayDe/Encoder for most
of the sun.nio.cs.ext.DoubleByte based double-byte charsets. Here is the
webrev
http://cr.openjdk.java.net/~sherman/7183053/webrev
The results of the "non -scientific" benchmark StrCodingBenchmarkDB
running on client
and server vm on my linux machine are included in docs_c (client) and
docs_s(server)
below.
http://cr.openjdk.java.net/~sherman/7183053/dbcs_c
http://cr.openjdk.java.net/~sherman/7183053/dbcs_s
Numbers are the time spent on the decoding/encoding operations, the
smaller the
better.
Thanks,
-Sherman
More information about the core-libs-dev
mailing list