RFR (XXS) 8080535: (ch) Expected size of Character.UnicodeBlock.map is not optimal

Martin Buchholz martinrb at google.com
Mon May 18 18:52:15 UTC 2015

On Fri, May 15, 2015 at 5:59 PM, Ivan Gerasimov <ivan.gerasimov at oracle.com>

> On 16.05.2015 2:18, Martin Buchholz wrote:
> I wouldn't bother defining the constant.
>  I only need it in the regression test, to check whether it was
> sufficient.

The problem you're trying to solve is (a small amount of) startup overhead.
Don't introduce __more__ startup overhead (another constant in the class
file) just to make your change more testable.

If you're serious about reducing overhead for static maps, you could:
- write a java agent that verifies that all maps stored in static fields
are never resized or oversized, and run all jtreg tests with that agent
- use a true immutable static compact map implementation, perhaps optimized
for String keys, in the spirit of
- initialize the static maps from a binary blob stored in a resource
instead of from java code

but any of those is a lot of work.  I would just check in the fix to

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