RFR: 8193034: Optimize URL.toExternalForm

[Martin Buchholz]

There's now a Martin-style benchmark at
http://cr.openjdk.java.net/~martin/webrevs/jdk/URLMicroBenchmark/
that suggests the code is ~ 25% faster with default JVM flags (C2) but ~
25% slower with C1, as you might expect with multiple String
concatenation.  I think we want to optimize for the default and assume that
multiple String concatenation does in fact get optimized.
I'm not planning to check in the benchmark code.

On Tue, Dec 5, 2017 at 2:10 AM, Chris Hegarty <chris.hegarty at oracle.com>
wrote:

>
> > On 5 Dec 2017, at 04:01, Martin Buchholz <martinrb at google.com> wrote:
> >
> > http://cr.openjdk.java.net/~martin/webrevs/jdk/URL.toExternalForm/
>
> Since the motivation for this change is performance, do you have any
> performance numbers / benchmarks that you can share?
>
> -Chris.
>
>
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