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sparse_strips/vello_common/src/flatten_simd.rs

diff --git a/sparse_strips/vello_common/src/flatten_simd.rs b/sparse_strips/vello_common/src/flatten_simd.rs
index 590b792..f65ad2f 100644
--- a/sparse_strips/vello_common/src/flatten_simd.rs
+++ b/sparse_strips/vello_common/src/flatten_simd.rs
@@ -49,6 +49,10 @@
 pub(crate) fn flatten<S: Simd>(
     simd: S,
     path: impl IntoIterator<Item = PathEl>,
+    // Note: we explicitly pass the `Affine` here instead of using `map` on
+    // the iterator because it seems like the `map` function isn't always inlined
+    // properly, even when annotating the closure with `#[inline(always)]`.
+    // See https://github.com/linebender/vello/pull/1600.
     affine: Affine,
     callback: &mut impl Callback,
     flatten_ctx: &mut FlattenCtx,