diff --git a/crates/coremem/src/driver.rs b/crates/coremem/src/driver.rs
index 234f25e..381012c 100644
--- a/crates/coremem/src/driver.rs
+++ b/crates/coremem/src/driver.rs
@@ -28,7 +28,7 @@ pub struct Driver<S> {
     time_spent_prepping_render: Duration,
     time_spent_blocked_on_render: Duration,
     time_spent_rendering: Arc<Mutex<Duration>>,
-    measurements: Vec<Box<dyn AbstractMeasurement>>,
+    measurements: Vec<Arc<dyn AbstractMeasurement>>,
     stimuli: StimuliAdapter,
     start_time: Instant,
     last_diag_time: Instant,
@@ -49,10 +49,10 @@ impl<S> Driver<S> {
             time_spent_blocked_on_render: Default::default(),
             time_spent_rendering: Default::default(),
             measurements: vec![
-                Box::new(meas::Time),
-                Box::new(meas::Meta),
-                Box::new(meas::Energy::world()),
-                Box::new(meas::Power::world()),
+                Arc::new(meas::Time),
+                Arc::new(meas::Meta),
+                Arc::new(meas::Energy::world()),
+                Arc::new(meas::Power::world()),
             ],
             stimuli: StimuliAdapter::new(),
             start_time: Instant::now(),
@@ -66,7 +66,7 @@ impl<S> Driver<S> {
     }
 
     pub fn add_measurement<Meas: AbstractMeasurement + 'static>(&mut self, m: Meas) {
-        self.measurements.push(Box::new(m));
+        self.measurements.push(Arc::new(m));
     }
 
     pub fn set_steps_per_stim(&mut self, steps_per_stim: u64) {
diff --git a/crates/coremem/src/meas.rs b/crates/coremem/src/meas.rs
index 2facc3c..4ef9102 100644
--- a/crates/coremem/src/meas.rs
+++ b/crates/coremem/src/meas.rs
@@ -2,17 +2,13 @@ use crate::geom::{Meters, Region, Torus, WorldRegion};
 use crate::real::{Real as _, ToFloat as _};
 use crate::cross::vec::Vec3;
 use crate::sim::GenericSim;
-use dyn_clone::{self, DynClone};
 use indexmap::IndexMap;
 use serde::{Serialize, Deserialize};
 
-// TODO: remove this Clone and Send requirement? Have Measurements be shared by-reference across
-// threads? i.e. Sync, and no Clone
-pub trait AbstractMeasurement: Send + Sync + DynClone {
+pub trait AbstractMeasurement: Send + Sync {
     fn eval(&self, state: &dyn GenericSim) -> String;
     fn key_value(&self, state: &dyn GenericSim) -> IndexMap<String, String>;
 }
-dyn_clone::clone_trait_object!(AbstractMeasurement);
 
 /// create one IndexMap out of several measurements
 pub fn eval_multiple_kv(state: &dyn GenericSim, meas: &[&dyn AbstractMeasurement]) -> IndexMap<String, String> {