diff --git a/crates/kernel/src/native/pcurve.rs b/crates/kernel/src/native/pcurve.rs
index 1a1ae807e5..157f50419a 100644
--- a/crates/kernel/src/native/pcurve.rs
+++ b/crates/kernel/src/native/pcurve.rs
@@ -60,7 +60,7 @@ const MAX_SPANS: usize = 4000;
 /// Refinement rounds of one fit.
 const MAX_ROUNDS: usize = 40;
 /// Samples per knot span when a fit starts.
-const PER_SPAN: usize = 8;
+const PER_SPAN: usize = 4;
 /// Spans a fit starts from (more where the curve has its own knots).
 const START_SPANS: usize = 4;