November 2017
Intermediate to advanced
398 pages
10h 14m
English
Content preview from Java 9 High Performance
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Space reduction
Since this method requires the counting of references, this count also needs to be efficiently stored. One way of reducing this count is to not use a separate memory for this purpose, but to rather employ the free system memory through the use of memory pointers that point towards empty spaces.
A tagged pointer is excellent since it is usually available in different programming languages. The reference count may only require 32 bits of storage, but the pointer can mean the use of even smaller space already available to the program.
Any reliable pointer available to objects can be used to store the reference count. In fact, additional pointer space can also be employed for storing the count and eliminate the need for extra ...
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