ParparVM performance: parity with warmed Java 25 (geomean 1.00x)#5327

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shai-almog merged 175 commits into

parparvm-perf-tier1

Jul 10, 2026

Commits on Jun 27, 2026

ParparVM perf tier1: box caches, BCE, conditional-volatile SSA, nursery GC, tagged Integer

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ParparVM: pre-size the StringBuilder in invokedynamic string-concat lowering

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ParparVM tagged-int: fix 4 header-deref crashes found by edge-case red-teaming

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ParparVM: native HashMap.get (closed-world hot-path wrapper collapse)

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ParparVM: native HashMap.put (closed-world hot-path wrapper collapse)

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ParparVM: native StringBuilder.append(int)/append(long) digit writers

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ParparVM: HashMap Entry object pool (eliminate churn allocation)

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ParparVM: StringBuilder.toString shares the buffer (copy-on-write)

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ParparVM: inline the full method-frame setup/teardown

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ParparVM: inline pop() (operand-stack pop helper)

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