lyng/notes/fast_ops_optimizations_plan.md

Fast Ops Optimizations Plan (Draft)

Baseline

• See notes/nested_range_baseline.md

Candidates (not started)

1. Primitive comparisons (done)
   • Emit fast CMP variants for known ObjString/ObjInt/ObjReal using temp/stable slots.
   • MixedCompareBenchmarkTest: 374 ms -> 347 ms.
2. Mixed numeric ops (done)
   • Allow INT+REAL arithmetic to use primitive REAL ops (no obj fallback).
   • MixedCompareBenchmarkTest: 347 ms -> 275 ms.
3. Boolean conversion (done; do not revert without review)
   • Skip redundant OBJ_TO_BOOL in logical AND/OR when compiler already emits BOOL.
   • MixedCompareBenchmarkTest: 275 ms -> 249 ms.
4. Range/loop hot path
   • Keep range iteration in INT ops, avoid accidental boxing.
   • Confirm loop-var slots avoid re-boxing in loop bodies.
5. String ops
   • Extend fast path for string comparisons in hot loops.
6. Box/unbox audit
   • Identify remaining BOX_OBJ / OBJ_TO_* in inner loops and eliminate when safe.