RFR: 8265448: (zipfs): Reduce read contention in ZipFileSystem [v2]

[Lance Andersen]

On Tue, 4 May 2021 14:10:52 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Jason Zaugg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Use pattern matching instanceof
>
> src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java line 2223:
> 
>> 2221:                 synchronized (zfch) {
>> 2222:                     n = zfch.position(pos).read(bb);
>> 2223:                 }
> 
> @LanceAndersen Are you planning to look at this? Do you mind checking the async close case to make sure that the synchronization isn't masking anything?
> 
> Also just to point out that pattern matching for instanceof ca be used here.

Yes, I plan to look at this.  It would also be good to have a couple of additional reviews as well :-)

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PR: https://git.openjdk.java.net/jdk/pull/3853