Domain > carlmastrangelo.com

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Date	IP Address
2025-01-31	192.81.130.241 (ClassC)

Port 443

HTTP/1.1 200 OKContent-Type: text/html; charsetutf-8Date: Mon, 23 Oct 2023 15:35:05 GMTTransfer-Encoding: chunked

!doctype html>html>  head>    meta charsetutf-8>    meta nameviewport contentwidthdevice-width, initial-scale1>    title>Carl's Blog/title>    base href/>    link relstylesheet typetext/css hrefstatic/style.css />    link relalternate typeapplication/rss+xml         titleRSS Feed for carlmastrangelo.com         href/blog/feed.rss />    link relalternate typeapplication/atom+xml         titleAtom Feed for carlmastrangelo.com         href/blog/feed.atom />        script async srchttps://www.googletagmanager.com/gtag/js?idG-PHYSZ2SMB6>/script>    script>      window.dataLayer  window.dataLayer || ;      function gtag(){dataLayer.push(arguments);}      gtag(js, new Date());      gtag(config, G-PHYSZ2SMB6);    /script>  /head>  body>    div classprimary>  img srcstatic/icon.jpg stylefloat:right; width128 height128 altCarl />  h1 classheader>a href/>Carl Mastrangelo/a>/h1>  p>A programming and hobby blog./p>  br />        div classpost>      h1>a hrefblog/accidental-class-loading-in-java>Accidental Class Loading in Java/a>/h1>p>Recently I’ve been working on improving the ergonomics of my tracing library a hrefhttps://www.perfmark.io/>PerfMark/a>.  One of the interesting things I noticed is that the JVM was loading some classes I didn’t expect it to.  Let’s find out why!/p>h3>“That’s Weird”/h3>p>PerfMark works on much older JVM’s, but strives to be as fast as possible.  To accomplish this, the code bootstraps itself based on what advanced JVM features are available (a hrefhttps://docs.oracle.com/javase/7/docs/api/java/lang/invoke/MethodHandles.html>MethodHandles/a>, a hrefhttps://docs.oracle.com/javase/9/docs/api/java/lang/invoke/VarHandle.html>VarHandles/a>, a hrefhttps://docs.oracle.com/en/java/javase/15/docs/api/java.base/java/lang/invoke/MethodHandles.Lookup.html#defineHiddenClass(byte%5B%5D,boolean,java.lang.invoke.MethodHandles.Lookup.ClassOption...)>Hidden Classes/a>, etc.).  Because of this, the library needs to avoid loading classes that aren’t usable.  In the

Subdomains

Date	Domain	IP
www.carlmastrangelo.com	2023-10-23	192.81.130.241

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Domain > carlmastrangelo.com

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