Xueming.Shen at Sun.COM
Mon May 18 13:21:25 PDT 2009
Performance of Inflater/Deflater does not change the class loading
jar files bundled with JDK/JRE, they have been "uncompressed" after
Ulf Zibis wrote:
> Am 04.05.2009 23:38, Martin Buchholz schrieb:
>> I think many people will be interested in performance improvements
>> in Inflater/Deflater. I may have time to help review.
> Yes, there is also interest from charset de/encoding side. See:
> Current charset mapping tables are hosted as huge String constants
> inside charset classes. Hosting them as resource data files would
> would avoid ~50 % disk-footprint wastage of the charsets.jar.
> Additionally sharing of overlapping charset mapping data would become
> manageable. Currently we only have ClassLoader#getResouceAsStream() to
> load such data files, but we can't use it, because the underlying
> buffered stream is too slow in respect of JVM startup time. We need
> fast nio direct buffer access via java.nio.channels.Channel to load
> the data from charsets.jar.
> So improving performance of jar/zip file access would be much
> appreciated. :-)
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