RFR: 8196869: Optimize Locale creation
claes.redestad at oracle.com
Tue Feb 6 17:51:22 UTC 2018
we can refactor sun.util.locale.BaseLocale+LocaleObjectCache to minimize
the number of SoftReferences created in Locale::<clinit> and when
looking up already defined BaseLocales inside the Locale constructor.
This is mainly a tiny startup optimization, dropping executed bytecode
during startup by a few thousand and reducing the minimum retained heap
by a few Kb, but also speeds up microbenchmarks repeatedly calling the
Locale constructor by ~1.25x. Tests stressing that dereferenced Locales
are disposed of promptly remain happy.
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