About: Adaptive optimization

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Adaptive optimization is a technique in computer science that performs dynamic recompilation of portions of a program based on the current execution profile. With a simple implementation, an adaptive optimizer may simply make a trade-off between just-in-time compilation and interpreting instructions. At another level, adaptive optimization may take advantage of local data conditions to optimize away branches and to use inline expansion to decrease the cost of procedure calls. Examples of adaptive optimization include HotSpot and HP's Dynamo system.

Attributes	Values
rdf:type	topical concept
rdfs:label	Adaptive optimization (en)
rdfs:comment	Adaptive optimization is a technique in computer science that performs dynamic recompilation of portions of a program based on the current execution profile. With a simple implementation, an adaptive optimizer may simply make a trade-off between just-in-time compilation and interpreting instructions. At another level, adaptive optimization may take advantage of local data conditions to optimize away branches and to use inline expansion to decrease the cost of procedure calls. Examples of adaptive optimization include HotSpot and HP's Dynamo system. (en)
sameAs	Adaptive optimization Adaptive optimization
dbp:wikiPageUsesTemplate	dbt:Citation_needed dbt:Multiple_issues dbt:Portal dbt:Primary_sources dbt:Refimprove dbt:Reflist
Subject	Compiler optimizations
Link from a Wikipage to an external page	http://citeseer.ist.psu.edu/arnold00adaptive.html
gold:hypernym	Technique
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Adaptive_optimization?oldid=1054646557&ns=0
Wikipage page ID	3959410 (xsd:integer)
page length (characters) of wiki page	2527 (xsd:nonNegativeInteger)
Wikipage revision ID	1054646557 (xsd:integer)
Link from a Wikipage to another Wikipage	Profile-guided optimization Compiler optimizations Java bytecode Java virtual machine HotSpot (virtual machine) Hot spot (computer programming) Just-in-time compilation Computer program Computer science Dynamic recompilation Reversible computing Inline expansion Interpreter (computing)
has abstract	Adaptive optimization is a technique in computer science that performs dynamic recompilation of portions of a program based on the current execution profile. With a simple implementation, an adaptive optimizer may simply make a trade-off between just-in-time compilation and interpreting instructions. At another level, adaptive optimization may take advantage of local data conditions to optimize away branches and to use inline expansion to decrease the cost of procedure calls. Consider a hypothetical banking application that handles transactions one after another. These transactions may be checks, deposits, and a large number of more obscure transactions. When the program executes, the actual data may consist of clearing tens of thousands of checks without processing a single deposit and without processing a single check with a fraudulent account number. An adaptive optimizer would compile assembly code to optimize for this common case. If the system then started processing tens of thousands of deposits instead, the adaptive optimizer would recompile the assembly code to optimize the new common case. This optimization may include inlining code. Examples of adaptive optimization include HotSpot and HP's Dynamo system. In some systems, notably the Java Virtual Machine, execution over a range of bytecode instructions can be provably reversed. This allows an adaptive optimizer to make risky assumptions about the code. In the above example, the optimizer may assume all transactions are checks and all account numbers are valid. When these assumptions prove incorrect, the adaptive optimizer can 'unwind' to a valid state and then interpret the byte code instructions correctly. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Adaptive_optimization
is Wikipage redirect of	Adaptive optimizer Deoptimization
is Link from a Wikipage to another Wikipage of	Adaptive algorithm Ahead-of-time compilation Java performance HotSpot (virtual machine) Just-in-time compilation Comparison of C Sharp and Java Comparison of application virtualization software Dynamic recompilation DynamoRIO Inline caching Interpreter (computing) JRuby Adaptive optimizer Deoptimization
is foaf:primaryTopic of	http://en.wikipedia.org/wiki/Adaptive_optimization

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