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Least Frequently Used (LFU) is a type of cache algorithm used to manage memory within a computer. The standard characteristics of this method involve the system keeping track of the number of times a block is referenced in memory. When the cache is full and requires more room the system will purge the item with the lowest reference frequency.
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Early algorithms for Boolean operations on polygons were based on the use of bitmaps.Using bitmaps in modeling polygon shapes has many drawbacks. One of the drawbacks is that the memory usage can be very large, since the resolution of polygons is proportional to the number of bits used to represent polygons.
Illustration of cache coloring. Left is virtual memory spaces, center is the physical memory space, and right is the CPU cache.. A physically indexed CPU cache is designed such that addresses in adjacent physical memory blocks take different positions ("cache lines") in the cache, but this is not the case when it comes to virtual memory; when virtually adjacent but not physically adjacent ...
Examples of memoization in various programming languages. groovy.lang.Closure#memoize() – Memoize is an Apache Groovy 1.8 language feature. Memoize – Memoize is a small library, written by Tim Bradshaw, for performing memoization in Common Lisp. IncPy – A custom Python interpreter that performs automatic memoization (with no required user ...
In computing, shadow memory is a technique used to track and store information on computer memory used by a program during its execution. Shadow memory consists of shadow bytes that map to individual bits or one or more bytes in main memory.
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Various Wikipedians have put together graphics tutorials. Some of these are still works in progress. It is preferred to work with open formats (such as PNG or SVG) and free licenses (such as public domain or GFDL) when possible. There are many free software programs available for creating and editing images.