diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 6da87c38ea1..d40dea14b86 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -25,6 +25,8 @@ jobs:
           toolchain: nightly-2021-10-24
           override: true
       - uses: Swatinem/rust-cache@v1
+        with:
+          key: key1
       - name: Install Miri
         run: |
           rustup component add miri
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 43300789307..1dd6d1aaa9e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -77,6 +77,8 @@ jobs:
           toolchain: nightly-2021-10-24
           override: true
       - uses: Swatinem/rust-cache@v1
+        with:
+          key: key1
       - name: Install Miri
         run: |
           rustup component add miri
@@ -96,6 +98,8 @@ jobs:
           toolchain: nightly-2021-10-24
           override: true
       - uses: Swatinem/rust-cache@v1
+        with:
+          key: key1
       - name: Install Miri
         run: |
           rustup component add miri
diff --git a/src/compute/comparison/mod.rs b/src/compute/comparison/mod.rs
index a3471f3b285..95ee88a17a9 100644
--- a/src/compute/comparison/mod.rs
+++ b/src/compute/comparison/mod.rs
@@ -240,58 +240,59 @@ macro_rules! compare_scalar {
             Boolean => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<BooleanScalar>().unwrap();
-                boolean::$op(lhs, rhs.value())
+                // validity checked above
+                boolean::$op(lhs, rhs.value().unwrap())
             }
             Int8 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<i8>>().unwrap();
-                primitive::$op::<i8>(lhs, rhs.value())
+                primitive::$op::<i8>(lhs, rhs.value().unwrap())
             }
             Int16 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<i16>>().unwrap();
-                primitive::$op::<i16>(lhs, rhs.value())
+                primitive::$op::<i16>(lhs, rhs.value().unwrap())
             }
             Int32 | Date32 | Time32(_) | Interval(IntervalUnit::YearMonth) => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<i32>>().unwrap();
-                primitive::$op::<i32>(lhs, rhs.value())
+                primitive::$op::<i32>(lhs, rhs.value().unwrap())
             }
             Int64 | Timestamp(_, _) | Date64 | Time64(_) | Duration(_) => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<i64>>().unwrap();
-                primitive::$op::<i64>(lhs, rhs.value())
+                primitive::$op::<i64>(lhs, rhs.value().unwrap())
             }
             UInt8 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<u8>>().unwrap();
-                primitive::$op::<u8>(lhs, rhs.value())
+                primitive::$op::<u8>(lhs, rhs.value().unwrap())
             }
             UInt16 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<u16>>().unwrap();
-                primitive::$op::<u16>(lhs, rhs.value())
+                primitive::$op::<u16>(lhs, rhs.value().unwrap())
             }
             UInt32 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<u32>>().unwrap();
-                primitive::$op::<u32>(lhs, rhs.value())
+                primitive::$op::<u32>(lhs, rhs.value().unwrap())
             }
             UInt64 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<u64>>().unwrap();
-                primitive::$op::<u64>(lhs, rhs.value())
+                primitive::$op::<u64>(lhs, rhs.value().unwrap())
             }
             Float16 => unreachable!(),
             Float32 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<f32>>().unwrap();
-                primitive::$op::<f32>(lhs, rhs.value())
+                primitive::$op::<f32>(lhs, rhs.value().unwrap())
             }
             Float64 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
                 let rhs = rhs.as_any().downcast_ref::<PrimitiveScalar<f64>>().unwrap();
-                primitive::$op::<f64>(lhs, rhs.value())
+                primitive::$op::<f64>(lhs, rhs.value().unwrap())
             }
             Utf8 => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
@@ -309,7 +310,7 @@ macro_rules! compare_scalar {
                     .as_any()
                     .downcast_ref::<PrimitiveScalar<i128>>()
                     .unwrap();
-                primitive::$op::<i128>(lhs, rhs.value())
+                primitive::$op::<i128>(lhs, rhs.value().unwrap())
             }
             Binary => {
                 let lhs = lhs.as_any().downcast_ref().unwrap();
diff --git a/src/scalar/boolean.rs b/src/scalar/boolean.rs
index 74df27534f3..47c3f9a9bc9 100644
--- a/src/scalar/boolean.rs
+++ b/src/scalar/boolean.rs
@@ -3,32 +3,21 @@ use crate::datatypes::DataType;
 use super::Scalar;
 
 /// The [`Scalar`] implementation of a boolean.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct BooleanScalar {
-    value: bool,
-    is_valid: bool,
-}
-
-impl PartialEq for BooleanScalar {
-    fn eq(&self, other: &Self) -> bool {
-        self.is_valid == other.is_valid && ((!self.is_valid) | (self.value == other.value))
-    }
+    value: Option<bool>,
 }
 
 impl BooleanScalar {
     /// Returns a new [`BooleanScalar`]
     #[inline]
-    pub fn new(v: Option<bool>) -> Self {
-        let is_valid = v.is_some();
-        Self {
-            value: v.unwrap_or_default(),
-            is_valid,
-        }
+    pub fn new(value: Option<bool>) -> Self {
+        Self { value }
     }
 
-    /// The value irrespectively of the validity
+    /// The value
     #[inline]
-    pub fn value(&self) -> bool {
+    pub fn value(&self) -> Option<bool> {
         self.value
     }
 }
@@ -41,7 +30,7 @@ impl Scalar for BooleanScalar {
 
     #[inline]
     fn is_valid(&self) -> bool {
-        self.is_valid
+        self.value.is_some()
     }
 
     #[inline]
diff --git a/src/scalar/primitive.rs b/src/scalar/primitive.rs
index 83c78fef643..2d2c827fdf7 100644
--- a/src/scalar/primitive.rs
+++ b/src/scalar/primitive.rs
@@ -8,26 +8,16 @@ use super::Scalar;
 
 /// The implementation of [`Scalar`] for primitive, semantically equivalent to [`Option<T>`]
 /// with [`DataType`].
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct PrimitiveScalar<T: NativeType> {
-    // Not Option<T> because this offers a stabler pointer offset on the struct
-    value: T,
-    is_valid: bool,
+    value: Option<T>,
     data_type: DataType,
 }
 
-impl<T: NativeType> PartialEq for PrimitiveScalar<T> {
-    fn eq(&self, other: &Self) -> bool {
-        self.data_type == other.data_type
-            && self.is_valid == other.is_valid
-            && ((!self.is_valid) | (self.value == other.value))
-    }
-}
-
 impl<T: NativeType> PrimitiveScalar<T> {
     /// Returns a new [`PrimitiveScalar`].
     #[inline]
-    pub fn new(data_type: DataType, v: Option<T>) -> Self {
+    pub fn new(data_type: DataType, value: Option<T>) -> Self {
         if !T::is_valid(&data_type) {
             Err(ArrowError::InvalidArgumentError(format!(
                 "Type {} does not support logical type {}",
@@ -36,17 +26,12 @@ impl<T: NativeType> PrimitiveScalar<T> {
             )))
             .unwrap()
         }
-        let is_valid = v.is_some();
-        Self {
-            value: v.unwrap_or_default(),
-            is_valid,
-            data_type,
-        }
+        Self { value, data_type }
     }
 
-    /// Returns the value irrespectively of its validity.
+    /// Returns the optional value.
     #[inline]
-    pub fn value(&self) -> T {
+    pub fn value(&self) -> Option<T> {
         self.value
     }
 
@@ -54,12 +39,7 @@ impl<T: NativeType> PrimitiveScalar<T> {
     /// # Panic
     /// This function panics if the `data_type` is not valid for self's physical type `T`.
     pub fn to(self, data_type: DataType) -> Self {
-        let v = if self.is_valid {
-            Some(self.value)
-        } else {
-            None
-        };
-        Self::new(data_type, v)
+        Self::new(data_type, self.value)
     }
 }
 
@@ -78,7 +58,7 @@ impl<T: NativeType> Scalar for PrimitiveScalar<T> {
 
     #[inline]
     fn is_valid(&self) -> bool {
-        self.is_valid
+        self.value.is_some()
     }
 
     #[inline]
diff --git a/tests/it/scalar/boolean.rs b/tests/it/scalar/boolean.rs
index a98b72210ca..9882e5a77ee 100644
--- a/tests/it/scalar/boolean.rs
+++ b/tests/it/scalar/boolean.rs
@@ -20,7 +20,7 @@ fn equal() {
 fn basics() {
     let a = BooleanScalar::new(Some(true));
 
-    assert!(a.value());
+    assert_eq!(a.value(), Some(true));
     assert_eq!(a.data_type(), &DataType::Boolean);
     assert!(a.is_valid());
 
diff --git a/tests/it/scalar/primitive.rs b/tests/it/scalar/primitive.rs
index c248689f3ec..3cb26707eb1 100644
--- a/tests/it/scalar/primitive.rs
+++ b/tests/it/scalar/primitive.rs
@@ -20,9 +20,8 @@ fn equal() {
 fn basics() {
     let a = PrimitiveScalar::from(Some(2i32));
 
-    assert_eq!(a.value(), 2i32);
+    assert_eq!(a.value(), Some(2i32));
     assert_eq!(a.data_type(), &DataType::Int32);
-    assert!(a.is_valid());
 
     let a = a.to(DataType::Date32);
     assert_eq!(a.data_type(), &DataType::Date32);