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java8とgcに関するyassのブックマーク (3)

Java 8 Strings: A Comprehensive Guide to Memory Efficiency
In the ever-evolving realm of Java programming, Java 8 has introduced remarkable enhancements, especially in the domain of strings. String manipulation, an elementary operation in any programming language, has witnessed a transf ormation with the introduction of new features and optimizations in Java 8. Among these innovations, string deduplication stands out as a technique aimed at improving both
yass 2014/09/04
java

java8

jvm

gc

string

g1gc
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String Deduplication - A new feature in Java 8 Update 20
Strings consume a lot of memory in any application. Especially the char[] containing the individual UTF-16 characters is contributing to most of the memory consumption of a JVM by each character eating up two bytes. It is not uncommon to find 30% of the memory consumed by Strings, because not only are Strings the best format to interact with humans, but also popular HTTP APIs use lots of Strings.
yass 2014/09/03
java

Java8

gc

g1gc

string
リンク
Only the Good Die Young (or Move Off-heap?) | Blog of Christian Felde
yass 2014/08/31
"keep only a few private fields, 2 ints + 2 longs + 2 object references (Unsafe and a hash function), for the duration of the instance. The rest are short lived or managed off-heap. / BOHMap must do more work than the standard HashMap, since it needs to copy data between on-heap and off-heap memory"

java

gc

offheap

unsafe

hashtable

binary

java8

serialize
リンク
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