multi-core-inverter: test an alternate Vec-based stimulus

it's about 0.5% slower. not much.

crates/applications/multi_core_inverter/src/main.rs

@@ -43,6 +43,7 @@ use coremem::cross::compound::list::{
     Empty,
     EnumerateU32,
     Flatten as _,
+    IntoVec as _,
     List1,
     Map,
     MapVisitor,
@@ -54,7 +55,7 @@ use coremem::meas;
 use coremem::real::{self, Real as _};
 use coremem::sim::spirv::{self, SpirvSim};
 use coremem::sim::units::Seconds;
-use coremem::stim::{CurlStimulus, Exp, Gated, Shifted};
+use coremem::stim::{AbstractStimulus, CurlStimulus, DynStimuli, Exp, Gated, Shifted};
 use coremem::Driver;
 
 type R = real::R32;
@@ -98,6 +99,15 @@ where
     }
 }
 
+struct MapIntoBoxStimulus;
+impl<S: AbstractStimulus + 'static> MapVisitor<S> for MapIntoBoxStimulus {
+    type Output = Box<dyn AbstractStimulus>;
+    fn map(&self, s: S) -> Self::Output {
+        Box::new(s)
+    }
+}
+
+
 enum DriveDirection {
     High,
     Low,
@@ -372,6 +382,7 @@ fn main() {
 
     let duration = Seconds(params.clock_phase_duration * (num_cycles + 3) as f32);
 
+    // let stim = DynStimuli::from_vec(stim.map(MapIntoBoxStimulus).into_vec());
     let mut driver = driver.with_stimulus(stim);
 
     let prefix = "out/applications/multi_core_inverter/19-4ns-1e7A/";