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| | V8 reduced its heap size up to 43%! Learn how in "Pointer Compression in V8"!
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| | In this post, we are going to take a deep dive into pointer tagging, where metadata is encoded into a word-sized pointer. Doing so allows us to keep a compact representation that can be passed around in machine registers. This is very common in implementing dynamic programming languages, but can really be used anywhere that additional runtime information is needed about a pointer. We will look at a handful of different ways these pointers can be encoded and see how the compiler can optimize them for diff...
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| This post is part of the Writing a JVM in Rust series. I have written a JVM in Rust A JVM in Rust part 2 - The class files format ??thispost A JVM in Rust part 3 - Parsing class files A JVM in Rust part 4 - The Java bytecode A JVM in Rust part 5 - Executing instructions A JVM in Rust part 6 - Methods and exceptions A JVM in Rust part 7 - Objects and GC A JVM in Rust part 8 - Retrospective In this post, I will discuss the .