RFR: 8193034: Optimize URL.toExternalForm

[Alan Bateman]

On 11/12/2017 17:24, Martin Buchholz wrote:
> There's now a Martin-style benchmark at
> http://cr.openjdk.java.net/~martin/webrevs/jdk/URLMicroBenchmark/ 
> <http://cr.openjdk.java.net/%7Emartin/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.
>
Good to confirm the improvement, I think the change is good to push.

-Alan