Miscellaneous improvements to "jar".

Ulf Zibis Ulf.Zibis at gmx.de
Fri Jun 26 18:34:24 UTC 2009

Am 26.06.2009 17:47, Xueming Shen schrieb:
> Ulf,
> I do have a "prototype implementation" that uses buffer based 
> read/write on Jar/ZipFile, it
> is not that "much" faster as you would have expected (basically the 
> gain of using direct buffer
> comes from saving one or two memory copy of the content,  which is 
> very faster, compared to
> the "real hard" work of moving bits from harddisk to memory).

Often those bits are just cached in memory from OS side, maybe also big 
chunks of rt.jar and charsets.jar after VM is launched.
Another 2 cents!


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