On Fri, 11 Oct 2024 14:05:40 GMT, Lance Andersen <lan...@openjdk.org> wrote:

> I think we need to be a bit cautious with the proposed change while I 
> understand the desire to remove potentially unneeded code.

I understand the need to be cautious in this area. But I would also like to 
avoid cargo-culting this for another 21 years :-)  

> I have not yet found a specific issue for the for the original need for the 
> overload of fill, but have not looked to hard either

If we trust the zlib change log, the original need retired with 1.2.0. Any of 
the performance-motivated forks like chromium-zlib or cloudflare-zlib should 
have been forked long after this. Perhaps @simonis can confirm. 

>, and the constructor in Inflater.java also makes reference to gzip for which 
>we do not have as much test coverage as we do for Zip.

It's interesting that `GZIPInputStream` does _not_ override 
`InflaterInputStream.fill`, but _does_ use `nowrap`.

The extra dummy byte note in the Inflater constructor is now misleading and 
should probably go too. Would require a CSR. 

The `@param nowrap` note is perhaps also misleading in that it is not actually 
specific to GZIP. It just tells zlib to expect raw deflated data, without any 
wrapping, GZIP or zlib. I guess since the only wrapping supported by the JDK is 
GZIP, the note is maybe okay. But if we do a CSR, I think we should relax this 
note to not reference GZIP.  

> So we might want to hold off on this PR for JDK 24 while we try to do some 
> more archaeological digging.

That is fair.

> As far as which zlib with the openJDK, currently the openjdk project bundles 
> zlib with the windows builds and relies on the zlib bundled with the various 
> OS's
> 
> I would be surprised to find any vendor using a zlib below zlib 1.2.13 or 
> 1.3.1

Yes, that would indeed be awkward.

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PR Comment: https://git.openjdk.org/jdk/pull/21467#issuecomment-2407549193

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