In 64-bit Hotspot, Java objects have an object header of 128 bits: a 64 bit multi-purpose header (‘mark’ or ‘lock’) word and a 64-bit class pointer. With typical average object sizes of 5-6 words, this is quite significant: 2 of those words are al... (more…)
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The justices finished up the first week of the new term by finally hearing argument in Google v. Oracle, a case that has been pending at the Supreme Court since the fall of 2018. The high-stakes dispute presents a challenge by Oracle (the current owner of... (more…)
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Introspecting Instrumented Java using the Probes Open API...
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Your java program is a weird planet. And it’s time to send nudge4j’s space probe to explore what’s going on. (more…)
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