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

[Martin Buchholz]

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

>
>
> 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
jdk/src/share/classes/sun/util/PreHashedMap.java
- 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
s/256/BETTER_SIZE/