Search Results

Search found 10 results on 1 pages for 'cactus'.

Page 1/1 | 1 

  • Debugging Cactus Tests in Eclipse

    - by Th3sandm4n
    Side note: This is inherited code, I didn't do any of the setup and am new to the project. I'm trying to set up remote debugging in Eclipse for these unit tests that use Cactus. I've read around a bit (but I can't seem to find any REAL information how to set this up). Closest I've found is here (http://www.eclipse.org/webtools/community/tutorials/CactusInWTP/CactusInWTP.html), but it just says to Debug - Debug on Server, but nowhere does it say where the debug port is set or anything, and I can't find anything on how to enable this, set it. Just asking to see if anyone has set this up before, it would really help stepping through the code rather than just logging. The plugin (http://jakarta.apache.org/cactus/integration/eclipse/runner_plugin.html) Looks promising, but I also don't even know where to download it, it doesn't link to a location -.- The project uses ant, cactus, and I'm using Eclipse. Thanks EDIT Here is the target I'm using <junit fork="no" forkmode="perTest" printsummary="yes" haltonfailure="no" haltonerror="no" failureproperty="tests.failed"> <jvmarg value="-Xdebug" /> <jvmarg value="-Xrunjdwp:transport=dt_socket,address=localhost:8005,server=y,suspend=y" /> <formatter type="xml" usefile="true" /> <formatter type="plain" usefile="false" /> <classpath> <pathelement location="${clover.jar}"/> <path refid="cactus.classpath.id" /> <pathelement location="../ejb/src" /> </classpath> <sysproperty key="cactus.contextURL" value="${cactus.contextURL}"/> <test name="com.test.AllTests" outfile="TESTS" /> </junit>

    Read the article

  • Cactus versus mock objects (jMock, Easy mock)

    - by Thomman
    I'm little confused with Cactus and mock objects (jMock, Easy mock). Could anyone please answer the following questions? When to use Cactus for testing? When not to use Cactus for testing? When to use mock objects for testing? When not to use mock objects for testing?

    Read the article

  • java.lang.NoSuchMethodError: javax.persistence.OneToMany.orphanRemoval()Z

    - by Panayiotis Karabassis
    I am getting this error: java.lang.NoSuchMethodError: javax.persistence.OneToMany.orphanRemoval()Z These are the jars in my classpath: com.sun.faces/jsf-api/jars/jsf-api-2.0.0.jar com.sun.faces/jsf-impl/jars/jsf-impl-2.0.0.jar org.apache.myfaces.orchestra/myfaces-orchestra-core20/jars/myfaces-orchestra-core20-1.5-SNAPSHOT.jar commons-lang/commons-lang/jars/commons-lang-2.1.jar commons-logging/commons-logging/jars/commons-logging-1.1.1.jar org.springframework/spring/jars/spring-2.5.6.jar commons-el/commons-el/jars/commons-el-1.0.jar org.richfaces.ui/richfaces-ui/jars/richfaces-ui-3.3.3.Final.jar org.richfaces.framework/richfaces-api/jars/richfaces-api-3.3.3.Final.jar commons-collections/commons-collections/jars/commons-collections-3.2.jar commons-beanutils/commons-beanutils/jars/commons-beanutils-1.8.0.jar org.richfaces.framework/richfaces-impl-jsf2/jars/richfaces-impl-jsf2-3.3.3.Final.jar com.sun.facelets/jsf-facelets/jars/jsf-facelets-1.1.14.jar org.hibernate/hibernate-core/jars/hibernate-core-3.6.0.Final.jar antlr/antlr/jars/antlr-2.7.6.jar dom4j/dom4j/jars/dom4j-1.6.1.jar org.hibernate/hibernate-commons-annotations/jars/hibernate-commons-annotations-3.2.0.Final.jar org.slf4j/slf4j-api/jars/slf4j-api-1.6.1.jar org.hibernate.javax.persistence/hibernate-jpa-2.0-api/jars/hibernate-jpa-2.0-api-1.0.0.Final.jar javax.transaction/jta/jars/jta-1.1.jar org.hibernate/hibernate-c3p0/jars/hibernate-c3p0-3.6.0.Final.jar c3p0/c3p0/jars/c3p0-0.9.1.jar org.hibernate/hibernate-entitymanager/jars/hibernate-entitymanager-3.6.0.Final.jar cglib/cglib/jars/cglib-2.2.jar asm/asm/jars/asm-3.1.jar javassist/javassist/jars/javassist-3.12.0.GA.jar org.hibernate/hibernate-search/jars/hibernate-search-3.3.0.Final.jar org.hibernate/hibernate-search-analyzers/jars/hibernate-search-analyzers-3.3.0.Final.jar org.apache.lucene/lucene-core/jars/lucene-core-3.0.3.jar org.apache.lucene/lucene-analyzers/jars/lucene-analyzers-3.0.3.jar mysql/mysql-connector-java/jars/mysql-connector-java-5.1.13.jar com.ocpsoft/prettyfaces-jsf2/jars/prettyfaces-jsf2-3.0.1.jar commons-digester/commons-digester/jars/commons-digester-2.0.jar org.slf4j/slf4j-log4j12/jars/slf4j-log4j12-1.6.1.jar log4j/log4j/bundles/log4j-1.2.16.jar xom/xom/jars/xom-1.2.5.jar xml-apis/xml-apis/jars/xml-apis-1.3.03.jar xerces/xercesImpl/jars/xercesImpl-2.8.0.jar xalan/xalan/jars/xalan-2.7.0.jar org.jboss.jsfunit/jboss-jsfunit-core/jars/jboss-jsfunit-core-1.3.0.Final.jar net.sourceforge.htmlunit/htmlunit/jars/htmlunit-2.8.jar xalan/xalan/jars/xalan-2.7.1.jar xalan/serializer/jars/serializer-2.7.1.jar xml-apis/xml-apis/jars/xml-apis-1.3.04.jar commons-collections/commons-collections/jars/commons-collections-3.2.1.jar commons-lang/commons-lang/jars/commons-lang-2.4.jar org.apache.httpcomponents/httpclient/jars/httpclient-4.0.1.jar org.apache.httpcomponents/httpcore/jars/httpcore-4.0.1.jar commons-codec/commons-codec/jars/commons-codec-1.4.jar org.apache.httpcomponents/httpmime/jars/httpmime-4.0.1.jar org.apache.james/apache-mime4j/jars/apache-mime4j-0.6.jar net.sourceforge.htmlunit/htmlunit-core-js/jars/htmlunit-core-js-2.8.jar xerces/xercesImpl/jars/xercesImpl-2.9.1.jar net.sourceforge.nekohtml/nekohtml/jars/nekohtml-1.9.14.jar net.sourceforge.cssparser/cssparser/jars/cssparser-0.9.5.jar org.w3c.css/sac/jars/sac-1.3.jar commons-io/commons-io/jars/commons-io-1.4.jar cactus/cactus/jars/cactus-13-1.7.1.jar cactus/cactus-ant/jars/cactus-ant-13-1.7.1.jar commons-httpclient/commons-httpclient/jars/commons-httpclient-2.0.2.jar junit/junit/jars/junit-3.8.1.jar aspectj/aspectjrt/jars/aspectjrt-1.2.1.jar cargo/cargo/jars/cargo-0.5.jar ant/ant/jars/ant-1.5.4.jar and this is my ivy.xml: <dependencies> <!-- JSF 2.0 RI --> <dependency org="com.sun.faces" name="jsf-api" rev="2.0.0"/> <dependency org="com.sun.faces" name="jsf-impl" rev="2.0.0"/> <!-- MyFaces Orchestra --> <dependency org="org.apache.myfaces.orchestra" name="myfaces-orchestra-core20" rev="1.5-SNAPSHOT"/> <dependency org="org.springframework" name="spring" rev="2.5.6"/> <dependency org="commons-el" name="commons-el" rev="1.0"/> <!-- RichFaces --> <dependency org="org.richfaces.ui" name="richfaces-ui" rev="3.3.3.Final"/> <dependency org="org.richfaces.framework" name="richfaces-impl-jsf2" rev="3.3.3.Final"/> <dependency org="com.sun.facelets" name="jsf-facelets" rev="1.1.14"/> <!-- Hibernate --> <dependency org="org.hibernate" name="hibernate-core" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-c3p0" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-entitymanager" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-search" rev="3.3.0.Final"/> <dependency org="mysql" name="mysql-connector-java" rev="5.1.13"/> <!-- PrettyFaces --> <dependency org="com.ocpsoft" name="prettyfaces-jsf2" rev="3.0.1"/> <!-- SLF4J --> <dependency org="org.slf4j" name="slf4j-api" rev="1.6.1"/> <dependency org="org.slf4j" name="slf4j-log4j12" rev="1.6.1"/> <!-- XOM --> <dependency org="xom" name="xom" rev="1.2.5"/> <!-- JSF Unit --> <dependency org="org.jboss.jsfunit" name="jboss-jsfunit-core" rev="1.3.0.Final" conf="development"/> </dependencies> I am deploying to tomcat 6.0 Update After the answer below, I solved this by adding the following dependency to my ivy.xml: <dependency org="org.hibernate.javax.persistence" name="hibernate-jpa-2.0-api" rev="1.0.0.Final"/> then putting this jar above everything else under Eclipse's build order tab. I was using JRE/JDK 6.

    Read the article

  • java.lang.NoSuchMethodError: javax.persistence.OneToMany.orphanRemoval()Z

    - by Panayiotis Karabassis
    I am getting this error: java.lang.NoSuchMethodError: javax.persistence.OneToMany.orphanRemoval()Z These are the jars in my classpath: com.sun.faces/jsf-api/jars/jsf-api-2.0.0.jar com.sun.faces/jsf-impl/jars/jsf-impl-2.0.0.jar org.apache.myfaces.orchestra/myfaces-orchestra-core20/jars/myfaces-orchestra-core20-1.5-SNAPSHOT.jar commons-lang/commons-lang/jars/commons-lang-2.1.jar commons-logging/commons-logging/jars/commons-logging-1.1.1.jar org.springframework/spring/jars/spring-2.5.6.jar commons-el/commons-el/jars/commons-el-1.0.jar org.richfaces.ui/richfaces-ui/jars/richfaces-ui-3.3.3.Final.jar org.richfaces.framework/richfaces-api/jars/richfaces-api-3.3.3.Final.jar commons-collections/commons-collections/jars/commons-collections-3.2.jar commons-beanutils/commons-beanutils/jars/commons-beanutils-1.8.0.jar org.richfaces.framework/richfaces-impl-jsf2/jars/richfaces-impl-jsf2-3.3.3.Final.jar com.sun.facelets/jsf-facelets/jars/jsf-facelets-1.1.14.jar org.hibernate/hibernate-core/jars/hibernate-core-3.6.0.Final.jar antlr/antlr/jars/antlr-2.7.6.jar dom4j/dom4j/jars/dom4j-1.6.1.jar org.hibernate/hibernate-commons-annotations/jars/hibernate-commons-annotations-3.2.0.Final.jar org.slf4j/slf4j-api/jars/slf4j-api-1.6.1.jar org.hibernate.javax.persistence/hibernate-jpa-2.0-api/jars/hibernate-jpa-2.0-api-1.0.0.Final.jar javax.transaction/jta/jars/jta-1.1.jar org.hibernate/hibernate-c3p0/jars/hibernate-c3p0-3.6.0.Final.jar c3p0/c3p0/jars/c3p0-0.9.1.jar org.hibernate/hibernate-entitymanager/jars/hibernate-entitymanager-3.6.0.Final.jar cglib/cglib/jars/cglib-2.2.jar asm/asm/jars/asm-3.1.jar javassist/javassist/jars/javassist-3.12.0.GA.jar org.hibernate/hibernate-search/jars/hibernate-search-3.3.0.Final.jar org.hibernate/hibernate-search-analyzers/jars/hibernate-search-analyzers-3.3.0.Final.jar org.apache.lucene/lucene-core/jars/lucene-core-3.0.3.jar org.apache.lucene/lucene-analyzers/jars/lucene-analyzers-3.0.3.jar mysql/mysql-connector-java/jars/mysql-connector-java-5.1.13.jar com.ocpsoft/prettyfaces-jsf2/jars/prettyfaces-jsf2-3.0.1.jar commons-digester/commons-digester/jars/commons-digester-2.0.jar org.slf4j/slf4j-log4j12/jars/slf4j-log4j12-1.6.1.jar log4j/log4j/bundles/log4j-1.2.16.jar xom/xom/jars/xom-1.2.5.jar xml-apis/xml-apis/jars/xml-apis-1.3.03.jar xerces/xercesImpl/jars/xercesImpl-2.8.0.jar xalan/xalan/jars/xalan-2.7.0.jar org.jboss.jsfunit/jboss-jsfunit-core/jars/jboss-jsfunit-core-1.3.0.Final.jar net.sourceforge.htmlunit/htmlunit/jars/htmlunit-2.8.jar xalan/xalan/jars/xalan-2.7.1.jar xalan/serializer/jars/serializer-2.7.1.jar xml-apis/xml-apis/jars/xml-apis-1.3.04.jar commons-collections/commons-collections/jars/commons-collections-3.2.1.jar commons-lang/commons-lang/jars/commons-lang-2.4.jar org.apache.httpcomponents/httpclient/jars/httpclient-4.0.1.jar org.apache.httpcomponents/httpcore/jars/httpcore-4.0.1.jar commons-codec/commons-codec/jars/commons-codec-1.4.jar org.apache.httpcomponents/httpmime/jars/httpmime-4.0.1.jar org.apache.james/apache-mime4j/jars/apache-mime4j-0.6.jar net.sourceforge.htmlunit/htmlunit-core-js/jars/htmlunit-core-js-2.8.jar xerces/xercesImpl/jars/xercesImpl-2.9.1.jar net.sourceforge.nekohtml/nekohtml/jars/nekohtml-1.9.14.jar net.sourceforge.cssparser/cssparser/jars/cssparser-0.9.5.jar org.w3c.css/sac/jars/sac-1.3.jar commons-io/commons-io/jars/commons-io-1.4.jar cactus/cactus/jars/cactus-13-1.7.1.jar cactus/cactus-ant/jars/cactus-ant-13-1.7.1.jar commons-httpclient/commons-httpclient/jars/commons-httpclient-2.0.2.jar junit/junit/jars/junit-3.8.1.jar aspectj/aspectjrt/jars/aspectjrt-1.2.1.jar cargo/cargo/jars/cargo-0.5.jar ant/ant/jars/ant-1.5.4.jar and this is my ivy.xml: <dependencies> <!-- JSF 2.0 RI --> <dependency org="com.sun.faces" name="jsf-api" rev="2.0.0"/> <dependency org="com.sun.faces" name="jsf-impl" rev="2.0.0"/> <!-- MyFaces Orchestra --> <dependency org="org.apache.myfaces.orchestra" name="myfaces-orchestra-core20" rev="1.5-SNAPSHOT"/> <dependency org="org.springframework" name="spring" rev="2.5.6"/> <dependency org="commons-el" name="commons-el" rev="1.0"/> <!-- RichFaces --> <dependency org="org.richfaces.ui" name="richfaces-ui" rev="3.3.3.Final"/> <dependency org="org.richfaces.framework" name="richfaces-impl-jsf2" rev="3.3.3.Final"/> <dependency org="com.sun.facelets" name="jsf-facelets" rev="1.1.14"/> <!-- Hibernate --> <dependency org="org.hibernate" name="hibernate-core" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-c3p0" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-entitymanager" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-search" rev="3.3.0.Final"/> <dependency org="mysql" name="mysql-connector-java" rev="5.1.13"/> <!-- PrettyFaces --> <dependency org="com.ocpsoft" name="prettyfaces-jsf2" rev="3.0.1"/> <!-- SLF4J --> <dependency org="org.slf4j" name="slf4j-api" rev="1.6.1"/> <dependency org="org.slf4j" name="slf4j-log4j12" rev="1.6.1"/> <!-- XOM --> <dependency org="xom" name="xom" rev="1.2.5"/> <!-- JSF Unit --> <dependency org="org.jboss.jsfunit" name="jboss-jsfunit-core" rev="1.3.0.Final" conf="development"/> </dependencies> I am deploying to tomcat 6.0 Update After the answer below, I solved this by adding the following dependency to my ivy.xml: <dependency org="org.hibernate.javax.persistence" name="hibernate-jpa-2.0-api" rev="1.0.0.Final"/> then putting this jar above everything else under Eclipse's build order tab. I was using JRE/JDK 6.

    Read the article

  • UISearchBar cancel button color?

    - by cactus
    When I drop a UISearchBar into my view inside Interface Builder, and change its style to Black Opaque, the cancel button stays unfittingly blue / gray and doesn't become black. How can I make the cancel button black?

    Read the article

  • SEO with an iframe and a secondary domain

    - by MisterM
    Just a question, a client of the company I work for was They run the SEO page on a new domain (they own it for the client) http://kunstplanten-decoratie.nl/kunst_vetplanten/ while the original page is located at: http://www.deco-trade.nl/index.php/kunstplanten/alle-planten.html Below is the code they are using, they use an iframe to include the real domain. Is this even allowed by SEO tactics and does the content of the iframe even get indexed? <!doctype html> <html lang="nl" dir="ltr"> <head> <title>Kunst vetplanten | Deco Trade</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="description" content="De kunst vetplanten van Deco Trade zijn een mooi decoratiemiddel voor zowel thuis als op kantoor"> <meta name="keywords" content="Kunst vetplanten, KUNSTPLANTEN"> <link rel="stylesheet" type="text/css" href="../css.php"> </head> <body itemscope itemtype="http://schema.org/Florist"><div id="wrap"><div id="body"> <h1>Kunst vetplanten</h1> <p><img src="kunst_vetplanten.gif" alt="Kunst vetplanten | Deco Trade"><strong>Kunst vetplanten, KUNSTPLANTEN</strong></p> <h3>De kunst vetplanten van Deco Trade zijn een mooi decoratiemiddel voor zowel thuis als op kantoor</h3> <p>Deco Trade heeft een ruime sortering kunst vetplanten in verschillende maten. Een tweetal keuzes zijn de Crassula kunt vetplant en de Senecio kunst vetplant. De Crassula kunst vetplant is met zijn dikke diep groene bladeren en echte houten stammen een mooie vetplant voor op tafel of dressoir. Het model leent zich perfect voor presentatie in een luxe schaal, maar de Crassula laat zich ook goed combineren met een smalle hoge plantenbak.</p> <p>De diameter van de kunst Crassula is ±45-50cm en de hoogte inclusief de binnenpot is ±70cm. Standaard wordt de kunstplant geleverd in een plastic binnenpot zodat deze eenvoudig in een sierpot te plaatsen is. De afgebeelde sierpotten kunnen los besteld worden. Tevens leverbaar in een kleine maat van 40cm.</p> <p>De Senecio kunst vetplant, is met zijn vele blaadjes een leuke vetplant voor op tafel of in de vensterbank. Als enkel kunstplantje in een hoge sierpot, met meerdere op een rij, of in een luxe platte schaal, met deze kunst vetplant kun je perfect decoreren! De diameter van de Senecio kunstplant is ±30cm en de hoogte inclusief het binnenpotje is ±20cm. Standaard wordt het plantje geleverd in een 12cm plastic binnenpot zodat deze eenvoudig in een sierpot te plaatsen is. De afgebeelde sierpotten kunnen los besteld worden.</p> <p class="centre"><a href="../kunst_buxusbal/" title="Kunst buxusbal">Kunst buxusbal</a> <a href="../kunstbuxusballen/" title="Kunstbuxusballen">Kunstbuxusballen</a> <a href="../kunstcactus/" title="Kunstcactus">Kunstcactus</a> <a href="../kunst_cactus/" title="Kunst cactus">Kunst cactus</a> <a href="../kunst_bloeiende_planten/" title="Kunst bloeiende planten">Kunst bloeiende planten</a> <a href="../buiten_kunst_planten/" title="Buiten kunst planten">Buiten kunst planten</a> <a href="../kunst_ficus/" title="Kunst Ficus">Kunst Ficus</a> <a href="../kunst_guirlande/" title="Kunst Guirlande">Kunst Guirlande</a> <a href="../kunsthaag_elementen/" title="Kunsthaag elementen">Kunsthaag elementen</a> <a href="../uv_planten/" title="UV planten">UV planten</a> <a href="../grote_kunstplanten/" title="Grote kunstplanten">Grote kunstplanten</a></p> <p class="centre">Copyright 2011 <a href="../index.php">kunstplanten-decoratie.nl</a> | <a href="../contact.php" title="Contact">Contact</a> | <a href="../sitemap.php" title="Sitemap">Sitemap</a></p> </div></div> <iframe src="http://www.deco-trade.nl/index.php/kunstplanten/alle-planten.html" scrolling="no" frameborder="0"></iframe> </body> </html>

    Read the article

  • How do you unit test JEE code?

    - by marabol
    I want to ask for your prefered way to test JEE code? I found only three project, that are trying to help to code unit tests in JEE environment: http://jakarta.apache.org/cactus/ : Last Published: 2009-01-18 http://www.junitee.org/ : Last Release: 2004-12-11 http://ejb3unit.sourceforge.net/ : Last Release: 2008-05-17 So I wonder, is there any framework helping to write (j) unit test for JEE code? do you use embedded JEE servers like jboss or glassfish v3? do you mockup and inject by yourself? Thanks a lot...

    Read the article

  • NUnit integration programmatically with spring

    - by harkon
    Hi! I have a component based architecture framework designed and I use NUnit for isolated testing - okay so far. Now I want to enable integration tests. Therefore the tests use real implementations of the existing components. Each element of the component has a life cycle (init, start and stop) and I created a NUnit component. In the start section the Console runner of the NUnit will be executed. Okay - now if I have a test fixture class in my dlls in the execution path the runner exectues them - fine! But: And this is crucial! Each to be tested implementation exists so far in the process and I want to use this instances for testing. If I use NUnit runner in the current way each instance will be created twice - and above all: I have a spring container and a implementation registry. Via this registry I can get access to all instances in the processes. But how do I give the test fixture access to the existing registry? Good: I can start the component architecture framework in the startup of the nunit runner - but this is not what I want. My guide is the apache Cactus framework (with JUnit and tomcat, JBoss etc.) Can someone help? Thanks a lot! Check: http://cone.codeplex.com

    Read the article

  • Languages and VMs: Features that are hard to optimize and why

    - by mrjoltcola
    I'm doing a survey of features in preparation for a research project. Name a mainstream language or language feature that is hard to optimize, and why the feature is or isn't worth the price paid, or instead, just debunk my theories below with anecdotal evidence. Before anyone flags this as subjective, I am asking for specific examples of languages or features, and ideas for optimization of these features, or important features that I haven't considered. Also, any references to implementations that prove my theories right or wrong. Top on my list of hard to optimize features and my theories (some of my theories are untested and are based on thought experiments): 1) Runtime method overloading (aka multi-method dispatch or signature based dispatch). Is it hard to optimize when combined with features that allow runtime recompilation or method addition. Or is it just hard, anyway? Call site caching is a common optimization for many runtime systems, but multi-methods add additional complexity as well as making it less practical to inline methods. 2) Type morphing / variants (aka value based typing as opposed to variable based) Traditional optimizations simply cannot be applied when you don't know if the type of someting can change in a basic block. Combined with multi-methods, inlining must be done carefully if at all, and probably only for a given threshold of size of the callee. ie. it is easy to consider inlining simple property fetches (getters / setters) but inlining complex methods may result in code bloat. The other issue is I cannot just assign a variant to a register and JIT it to the native instructions because I have to carry around the type info, or every variable needs 2 registers instead of 1. On IA-32 this is inconvenient, even if improved with x64's extra registers. This is probably my favorite feature of dynamic languages, as it simplifies so many things from the programmer's perspective. 3) First class continuations - There are multiple ways to implement them, and I have done so in both of the most common approaches, one being stack copying and the other as implementing the runtime to use continuation passing style, cactus stacks, copy-on-write stack frames, and garbage collection. First class continuations have resource management issues, ie. we must save everything, in case the continuation is resumed, and I'm not aware if any languages support leaving a continuation with "intent" (ie. "I am not coming back here, so you may discard this copy of the world"). Having programmed in the threading model and the contination model, I know both can accomplish the same thing, but continuations' elegance imposes considerable complexity on the runtime and also may affect cache efficienty (locality of stack changes more with use of continuations and co-routines). The other issue is they just don't map to hardware. Optimizing continuations is optimizing for the less-common case, and as we know, the common case should be fast, and the less-common cases should be correct. 4) Pointer arithmetic and ability to mask pointers (storing in integers, etc.) Had to throw this in, but I could actually live without this quite easily. My feelings are that many of the high-level features, particularly in dynamic languages just don't map to hardware. Microprocessor implementations have billions of dollars of research behind the optimizations on the chip, yet the choice of language feature(s) may marginalize many of these features (features like caching, aliasing top of stack to register, instruction parallelism, return address buffers, loop buffers and branch prediction). Macro-applications of micro-features don't necessarily pan out like some developers like to think, and implementing many languages in a VM ends up mapping native ops into function calls (ie. the more dynamic a language is the more we must lookup/cache at runtime, nothing can be assumed, so our instruction mix is made up of a higher percentage of non-local branching than traditional, statically compiled code) and the only thing we can really JIT well is expression evaluation of non-dynamic types and operations on constant or immediate types. It is my gut feeling that bytecode virtual machines and JIT cores are perhaps not always justified for certain languages because of this. I welcome your answers.

    Read the article

1