Update all dependencies to latest versions

wasmtime 31→43, wasm-encoder/wasmparser 0.228→0.246, rustyline 15→18.

API migrations: F64Const now takes Ieee64 wrapper, wasmtime has own
Error type (wasmtime::bail! in host closures), cache_config_load_default
removed. Add performance regression limits to benchmark tests.

Cargo.toml

@@ -41,9 +41,9 @@ needless_collect = "warn"
 or_fun_call = "warn"
 
 [workspace.dependencies]
-wasm-encoder = "0.228"
-wasmparser = "0.228"
-wasmtime = "31"
+wasm-encoder = "0.246"
+wasmparser = "0.246"
+wasmtime = "43"
 anyhow = "1"
 thiserror = "2"
 proptest = "1"

crates/cli/Cargo.toml

@@ -13,4 +13,4 @@ wafer-core = { path = "../core", version = "0.1.0" }
 wasmtime = { workspace = true }
 anyhow = { workspace = true }
 clap = { version = "4", features = ["derive"] }
-rustyline = "15"
+rustyline = "18"

crates/core/src/codegen.rs

@@ -349,7 +349,7 @@ fn emit_op(f: &mut Function, op: &IrOp, ctx: &mut EmitCtx) {
         IrOp::PushF64(val) => {
             fsp_dec(f);
             f.instruction(&Instruction::GlobalGet(FSP))
-                .instruction(&Instruction::F64Const(*val))
+                .instruction(&Instruction::F64Const((*val).into()))
                 .instruction(&Instruction::F64Store(MEM8));
         }
 
@@ -855,14 +855,14 @@ fn emit_op(f: &mut Function, op: &IrOp, ctx: &mut EmitCtx) {
         // -- Float comparisons (cross-stack) --------------------------------
         IrOp::FZeroEq => {
             fpop(f);
-            f.instruction(&Instruction::F64Const(0.0))
+            f.instruction(&Instruction::F64Const(0.0.into()))
                 .instruction(&Instruction::F64Eq);
             bool_to_forth_flag(f, SCRATCH_BASE);
             push_via_local(f, SCRATCH_BASE + 1);
         }
         IrOp::FZeroLt => {
             fpop(f);
-            f.instruction(&Instruction::F64Const(0.0))
+            f.instruction(&Instruction::F64Const(0.0.into()))
                 .instruction(&Instruction::F64Lt);
             bool_to_forth_flag(f, SCRATCH_BASE);
             push_via_local(f, SCRATCH_BASE + 1);

crates/core/src/outer.rs

@@ -282,8 +282,6 @@ impl ForthVM {
     pub fn new_with_config(wafer_config: WaferConfig) -> anyhow::Result<Self> {
         let mut config = wasmtime::Config::new();
         config.cranelift_nan_canonicalization(false);
-        // Best-effort module caching
-        let _ = config.cache_config_load_default();
         let engine = Engine::new(&config)?;
         let output = Arc::new(Mutex::new(String::new()));
 

crates/core/src/runner.rs

@@ -21,7 +21,7 @@ struct RunnerHost {}
 fn make_engine() -> anyhow::Result<Engine> {
     let mut config = wasmtime::Config::new();
     config.cranelift_nan_canonicalization(false);
-    Engine::new(&config)
+    Ok(Engine::new(&config)?)
 }
 
 /// Execute a pre-compiled `.wasm` module from a file path.
@@ -336,7 +336,7 @@ fn create_host_func(
                     ((hi << 32) | lo, divisor)
                 };
                 if divisor == 0 {
-                    anyhow::bail!("division by zero");
+                    wasmtime::bail!("division by zero");
                 }
                 let quot = (dividend / divisor) as u32;
                 let rem = (dividend % divisor) as u32;
@@ -368,7 +368,7 @@ fn create_host_func(
             // Unimplemented host function: trap with a clear message.
             let name_owned = name.to_string();
             Func::new(store, void_type, move |_caller, _params, _results| {
-                anyhow::bail!("host function '{name_owned}' is not available in standalone mode")
+                wasmtime::bail!("host function '{name_owned}' is not available in standalone mode")
             })
         }
     }

crates/core/tests/comparison.rs

@@ -592,6 +592,9 @@ struct PerfBenchmark {
     verify: &'static str,
     expected: i32,
     samples: u32, // Number of runs for WAFER median
+    /// Maximum acceptable WAFER/gforth ratio (< 1.0 = WAFER faster).
+    /// Test fails if ratio exceeds this. Set ~40-50% above measured baseline.
+    max_ratio: f64,
 }
 
 fn perf_benchmarks() -> Vec<PerfBenchmark> {
@@ -603,6 +606,7 @@ fn perf_benchmarks() -> Vec<PerfBenchmark> {
             verify: "25 FIB",
             expected: 75025,
             samples: 5,
+            max_ratio: 0.65,
         },
         PerfBenchmark {
             name: "Factorial(12)x10K",
@@ -612,6 +616,7 @@ fn perf_benchmarks() -> Vec<PerfBenchmark> {
             verify: "12 FACT",
             expected: 479001600,
             samples: 5,
+            max_ratio: 0.75,
         },
         PerfBenchmark {
             name: "GCD-bench(500)",
@@ -621,6 +626,7 @@ fn perf_benchmarks() -> Vec<PerfBenchmark> {
             verify: "48 36 GCD",
             expected: 12,
             samples: 5,
+            max_ratio: 0.70,
         },
         PerfBenchmark {
             name: "NestedLoops(50)",
@@ -630,6 +636,7 @@ fn perf_benchmarks() -> Vec<PerfBenchmark> {
             verify: "5 NESTED",
             expected: 0,
             samples: 3,
+            max_ratio: 0.20,
         },
         PerfBenchmark {
             name: "Collatz(2K)",
@@ -641,6 +648,7 @@ fn perf_benchmarks() -> Vec<PerfBenchmark> {
             verify: "27 COLLATZ",
             expected: 111,
             samples: 3,
+            max_ratio: 0.45,
         },
     ]
 }
@@ -827,15 +835,17 @@ fn performance_report() {
     println!("  WAFER vs Gforth Performance Comparison (release mode)");
     println!("{sep}\n");
     println!(
-        "{:<22} {:>10} {:>10} {:>10} {:>10} {:>10}",
-        "Benchmark", "WAFER", "CONSOL", "gforth", "gf-fast", "WAFER/gf"
+        "{:<22} {:>10} {:>10} {:>10} {:>10} {:>10} {:>10}",
+        "Benchmark", "WAFER", "CONSOL", "gforth", "gf-fast", "WAFER/gf", "limit"
     );
     println!(
-        "{:<22} {:>10} {:>10} {:>10} {:>10} {:>10}",
-        "", "(us)", "(us)", "(us)", "(us)", ""
+        "{:<22} {:>10} {:>10} {:>10} {:>10} {:>10} {:>10}",
+        "", "(us)", "(us)", "(us)", "(us)", "", ""
     );
     println!("{thin}");
 
+    let mut regressions: Vec<String> = Vec::new();
+
     for bench in &benchmarks {
         let wafer = wafer_release
             .and_then(|w| measure_wafer_release(w, bench))
@@ -853,25 +863,45 @@ fn performance_report() {
         } else {
             wafer
         };
-        let ratio = gf.map_or_else(
-            || "-".to_string(),
-            |g| {
+        let ratio_val = gf.and_then(|g| {
             if g > 0 {
-                    format!("{:.2}x", best_wafer as f64 / g as f64)
+                Some(best_wafer as f64 / g as f64)
             } else {
-                    "-".to_string()
+                None
             }
-            },
-        );
+        });
+        let ratio = ratio_val.map_or_else(|| "-".to_string(), |r| format!("{r:.2}x"));
+        let limit_str = format!("{:.2}x", bench.max_ratio);
 
         println!(
-            "{:<22} {:>10} {:>10} {:>10} {:>10} {:>10}",
-            bench.name, wafer, consol, gf_str, gf_fast_str, ratio
+            "{:<22} {:>10} {:>10} {:>10} {:>10} {:>10} {:>10}",
+            bench.name, wafer, consol, gf_str, gf_fast_str, ratio, limit_str
         );
+
+        // Check regression limits
+        if let Some(r) = ratio_val {
+            if r > bench.max_ratio {
+                regressions.push(format!(
+                    "  {} ratio {:.2}x exceeds limit {:.2}x (REGRESSION)",
+                    bench.name, r, bench.max_ratio
+                ));
+            }
+            if r < 0.02 {
+                regressions.push(format!(
+                    "  {} ratio {:.4}x suspiciously low (measurement error?)",
+                    bench.name, r
+                ));
+            }
+        }
     }
 
     println!("{thin}");
     println!("  WAFER = all optimizations, CONSOL = after CONSOLIDATE");
     println!("  WAFER/gf = best(WAFER,CONSOL) vs gforth, < 1.0 means WAFER faster");
     println!("{sep}\n");
+
+    if !regressions.is_empty() {
+        let msg = regressions.join("\n");
+        panic!("Performance regression detected:\n{msg}");
+    }
 }