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VM optimizations

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sergeych committed 2026-02-16 06:16:29 +03:00
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notes/nested_loop_vm_state.md
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- 2026-02-15 baseline (fused int-compare jumps): 74 ms.
- Command: `./gradlew :lynglib:jvmTest -Pbenchmarks=true --tests '*NestedRangeBenchmarkTest*'`
- Notes: loop range checks use `JMP_IF_GTE_INT` (no CMP+bool temp).
- 2026-02-15 experiment (fast non-suspend cmds in hot path): 57 ms.
- Command: `./gradlew :lynglib:jvmTest -Pbenchmarks=true --tests '*NestedRangeBenchmarkTest*'`
- Notes: fast path for local int ops + local JMP_IF_FALSE/TRUE in VM.
- 2026-02-15 experiment (full fast-path sweep + capture-safe locals): 59 ms.
- Command: `./gradlew :lynglib:jvmTest -Pbenchmarks=true --tests '*NestedRangeBenchmarkTest*'`
- Notes: local numeric/bool/mixed-compare fast ops gated by non-captured locals.
### Hypothesis for Native slowdown
- Suspend/virtual dispatch per opcode dominates on K/N, even with no allocations in int ops.