WAFER

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Author	SHA1	Message	Date
ok2	71ee292c37	Release-mode benchmarks, UTIME word, consolidated promotion Three changes: 1. Add UTIME host function ( -- ud ) for microsecond timing in Forth. Enables self-timed benchmarks matching gforth's utime approach. 2. Switch comparison benchmarks to release mode: builds wafer binary with --release, measures via UTIME (excludes startup overhead). Previously measured debug-mode Rust overhead, not WASM execution. 3. Add stack-to-local promotion to consolidated codegen path. Words that pass is_promotable now use the StackSim emit path even in CONSOLIDATE'd modules, preventing performance regression. Release-mode results (WAFER beats gforth on 4/5 benchmarks): Factorial: 0.54x (2x faster) GCD: 0.50x (2x faster) NestedLoops: 0.10x (10x faster) Collatz: 0.31x (3x faster) Fibonacci: 1.47x (call overhead)	2026-04-09 19:44:26 +02:00
ok2	1e2ede58ac	Add cross-engine comparison test suite (WAFER vs gforth) 35 behavioral tests across 8 categories verify identical output between WAFER and gforth. Performance benchmarks compare execution speed for Fibonacci, Factorial, GCD, NestedLoops, and Collatz workloads. WAFER-only correctness tests run in CI without gforth; cross-engine comparison and performance report are opt-in via --ignored.	2026-04-09 16:19:48 +02:00

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SHA1

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Date

ok2

71ee292c37

Release-mode benchmarks, UTIME word, consolidated promotion

Three changes:

1. Add UTIME host function ( -- ud ) for microsecond timing in Forth.
   Enables self-timed benchmarks matching gforth's utime approach.

2. Switch comparison benchmarks to release mode: builds wafer binary
   with --release, measures via UTIME (excludes startup overhead).
   Previously measured debug-mode Rust overhead, not WASM execution.

3. Add stack-to-local promotion to consolidated codegen path. Words
   that pass is_promotable now use the StackSim emit path even in
   CONSOLIDATE'd modules, preventing performance regression.

Release-mode results (WAFER beats gforth on 4/5 benchmarks):
  Factorial:    0.54x (2x faster)
  GCD:          0.50x (2x faster)
  NestedLoops:  0.10x (10x faster)
  Collatz:      0.31x (3x faster)
  Fibonacci:    1.47x (call overhead)

2026-04-09 19:44:26 +02:00

ok2

1e2ede58ac

Add cross-engine comparison test suite (WAFER vs gforth)

35 behavioral tests across 8 categories verify identical output between
WAFER and gforth. Performance benchmarks compare execution speed for
Fibonacci, Factorial, GCD, NestedLoops, and Collatz workloads.

WAFER-only correctness tests run in CI without gforth; cross-engine
comparison and performance report are opt-in via --ignored.

2026-04-09 16:19:48 +02:00

2 Commits