diff --git a/src/cuda_backend.rs b/src/cuda_backend.rs
index a8beba18..edbb7700 100644
--- a/src/cuda_backend.rs
+++ b/src/cuda_backend.rs
@@ -396,20 +396,29 @@ impl CudaStorage {
         let ds = dev.htod_copy([dims, src_stride].concat())?;
         match (&self.slice, &mut dst.slice) {
             (CudaStorageSlice::F32(src), CudaStorageSlice::F32(dst)) => {
-                let func = dev.get_or_load_func("ucopy_f32", kernels::UNARY)?;
                 let mut dst = dst.slice_mut(dst_offset..);
-                // SAFETY: Set later by running the kernel.
-                let params = (el_count, dims.len(), &ds, src, &mut dst);
-                // SAFETY: ffi.
-                unsafe { func.launch(cfg, params) }?
+                if src_shape.is_contiguous(src_stride) {
+                    dev.dtod_copy(src, &mut dst)?
+                } else {
+                    let func = dev.get_or_load_func("ucopy_f32", kernels::UNARY)?;
+                    // SAFETY: Set later by running the kernel.
+                    let params = (el_count, dims.len(), &ds, src, &mut dst);
+                    // SAFETY: ffi.
+                    unsafe { func.launch(cfg, params) }?
+                }
             }
             (CudaStorageSlice::F64(src), CudaStorageSlice::F64(dst)) => {
-                let func = dev.get_or_load_func("ucopy_64", kernels::UNARY)?;
                 let mut dst = dst.slice_mut(dst_offset..);
-                // SAFETY: Set later by running the kernel.
-                let params = (el_count, dims.len(), &ds, src, &mut dst);
-                // SAFETY: ffi.
-                unsafe { func.launch(cfg, params) }?;
+                if src_shape.is_contiguous(src_stride) {
+                    dev.dtod_copy(src, &mut dst)?
+                } else {
+                    let func = dev.get_or_load_func("ucopy_64", kernels::UNARY)?;
+                    let mut dst = dst.slice_mut(dst_offset..);
+                    // SAFETY: Set later by running the kernel.
+                    let params = (el_count, dims.len(), &ds, src, &mut dst);
+                    // SAFETY: ffi.
+                    unsafe { func.launch(cfg, params) }?;
+                }
             }
             _ => {
                 return Err(CudaError::InternalError(