diff --git a/src/mappings.rs b/src/mappings.rs
index 55b4c2a..a417468 100644
--- a/src/mappings.rs
+++ b/src/mappings.rs
@@ -94,13 +94,13 @@ pub struct StrideMapping<const STRIDE_NUM: usize = 24> {
 
 impl<const STRIDE_NUM: usize> StrideMapping<STRIDE_NUM> {
     pub fn new() -> Self {
-        Self::from_json(vec!(
+        Self::from_json(&[
             (0, 0, 255, false)
-        ))
+        ])
     }
 
     pub fn new_jar() -> Self {
-        Self::from_json(vec!(
+        Self::from_json(&[
             (0, 0, 17, false),
             (1, 0, 17, false),
             (2, 0, 17, false),
@@ -119,11 +119,11 @@ impl<const STRIDE_NUM: usize> StrideMapping<STRIDE_NUM> {
             (15, 0, 17, false),
             (16, 0, 17, false),
             (17, 0, 17, false)
-        ))
+        ])
     }
 
     pub fn new_panel() -> Self {
-        Self::from_json(vec!(
+        Self::from_json(&[
             (0, 0, 16, false),
             (1, 0, 16, true),
             (2, 0, 16, false),
@@ -140,10 +140,10 @@ impl<const STRIDE_NUM: usize> StrideMapping<STRIDE_NUM> {
             (13, 0, 16, true),
             (14, 0, 16, false),
             (15, 0, 16, true),
-        ))
+        ])
     }
 
-    pub fn from_json(stride_json: Vec<(u8, u8, u8, bool)>) -> Self {
+    pub fn from_json(stride_json: &[(u8, u8, u8, bool)]) -> Self {
         let mut strides = [Stride::default(); STRIDE_NUM];
         let stride_count = stride_json.len();
         let mut physical_idx = 0;