refactor(rust): Use size_of/align_of from prelude

crates/polars-arrow/src/array/primitive/mod.rs

@@ -459,8 +459,8 @@ impl<T: NativeType> PrimitiveArray<T> {
 
         // SAFETY: this is fine, we checked size and alignment, and NativeType
         // is always Pod.
-        assert_eq!(std::mem::size_of::<T>(), std::mem::size_of::<U>());
-        assert_eq!(std::mem::align_of::<T>(), std::mem::align_of::<U>());
+        assert_eq!(size_of::<T>(), size_of::<U>());
+        assert_eq!(align_of::<T>(), align_of::<U>());
         let new_values = unsafe { std::mem::transmute::<Buffer<T>, Buffer<U>>(values) };
         PrimitiveArray::new(U::PRIMITIVE.into(), new_values, validity)
     }

crates/polars-arrow/src/bitmap/aligned.rs

@@ -55,7 +55,7 @@ impl<'a, T: BitChunk> AlignedBitmapSlice<'a, T> {
     /// The length (in bits) of the portion of the bitmap found in bulk.
     #[inline(always)]
     pub fn bulk_bitlen(&self) -> usize {
-        8 * std::mem::size_of::<T>() * self.bulk.len()
+        8 * size_of::<T>() * self.bulk.len()
     }
 
     /// The length (in bits) of the portion of the bitmap found in suffix.
@@ -77,7 +77,7 @@ impl<'a, T: BitChunk> AlignedBitmapSlice<'a, T> {
         offset %= 8;
 
         // Fast-path: fits entirely in one chunk.
-        let chunk_len = std::mem::size_of::<T>();
+        let chunk_len = size_of::<T>();
         let chunk_len_bits = 8 * chunk_len;
         if offset + len <= chunk_len_bits {
             let mut prefix = load_chunk_le::<T>(bytes) >> offset;

crates/polars-arrow/src/bitmap/bitmap_ops.rs

@@ -12,7 +12,7 @@ pub(crate) fn push_bitchunk<T: BitChunk>(buffer: &mut Vec<u8>, value: T) {
 
 /// Creates a [`Vec<u8>`] from a [`TrustedLen`] of [`BitChunk`].
 pub fn chunk_iter_to_vec<T: BitChunk, I: TrustedLen<Item = T>>(iter: I) -> Vec<u8> {
-    let cap = iter.size_hint().0 * std::mem::size_of::<T>();
+    let cap = iter.size_hint().0 * size_of::<T>();
     let mut buffer = Vec::with_capacity(cap);
     for v in iter {
         push_bitchunk(&mut buffer, v)
@@ -24,7 +24,7 @@ fn chunk_iter_to_vec_and_remainder<T: BitChunk, I: TrustedLen<Item = T>>(
     iter: I,
     remainder: T,
 ) -> Vec<u8> {
-    let cap = (iter.size_hint().0 + 1) * std::mem::size_of::<T>();
+    let cap = (iter.size_hint().0 + 1) * size_of::<T>();
     let mut buffer = Vec::with_capacity(cap);
     for v in iter {
         push_bitchunk(&mut buffer, v)

crates/polars-arrow/src/bitmap/utils/chunk_iterator/chunks_exact.rs

@@ -17,7 +17,7 @@ impl<'a, T: BitChunk> BitChunksExact<'a, T> {
     #[inline]
     pub fn new(bitmap: &'a [u8], length: usize) -> Self {
         assert!(length <= bitmap.len() * 8);
-        let size_of = std::mem::size_of::<T>();
+        let size_of = size_of::<T>();
 
         let bitmap = &bitmap[..length.saturating_add(7) / 8];
 

crates/polars-arrow/src/bitmap/utils/chunk_iterator/merge.rs

@@ -23,7 +23,7 @@ where
     // expected = [n5, n6, n7, c0, c1, c2, c3, c4]
 
     // 1. unset most significants of `next` up to `offset`
-    let inverse_offset = std::mem::size_of::<T>() * 8 - offset;
+    let inverse_offset = size_of::<T>() * 8 - offset;
     next <<= inverse_offset;
     // next    =  [n5, n6, n7, 0 , 0 , 0 , 0 , 0 ]
 

crates/polars-arrow/src/bitmap/utils/chunk_iterator/mod.rs

@@ -44,7 +44,7 @@ fn copy_with_merge<T: BitChunk>(dst: &mut T::Bytes, bytes: &[u8], bit_offset: us
     bytes
         .windows(2)
         .chain(std::iter::once([bytes[bytes.len() - 1], 0].as_ref()))
-        .take(std::mem::size_of::<T>())
+        .take(size_of::<T>())
         .enumerate()
         .for_each(|(i, w)| {
             let val = merge_reversed(w[0], w[1], bit_offset);
@@ -59,7 +59,7 @@ impl<'a, T: BitChunk> BitChunks<'a, T> {
 
         let slice = &slice[offset / 8..];
         let bit_offset = offset % 8;
-        let size_of = std::mem::size_of::<T>();
+        let size_of = size_of::<T>();
 
         let bytes_len = len / 8;
         let bytes_upper_len = (len + bit_offset + 7) / 8;
@@ -120,7 +120,7 @@ impl<'a, T: BitChunk> BitChunks<'a, T> {
                 // all remaining bytes
                 self.remainder_bytes
                     .iter()
-                    .take(std::mem::size_of::<T>())
+                    .take(size_of::<T>())
                     .enumerate()
                     .for_each(|(i, val)| remainder[i] = *val);
 
@@ -137,7 +137,7 @@ impl<'a, T: BitChunk> BitChunks<'a, T> {
 
     /// Returns the remainder bits in [`BitChunks::remainder`].
     pub fn remainder_len(&self) -> usize {
-        self.len - (std::mem::size_of::<T>() * ((self.len / 8) / std::mem::size_of::<T>()) * 8)
+        self.len - (size_of::<T>() * ((self.len / 8) / size_of::<T>()) * 8)
     }
 }
 

crates/polars-arrow/src/bitmap/utils/chunks_exact_mut.rs

@@ -4,7 +4,7 @@ use super::BitChunk;
 ///
 /// # Safety
 /// The slices returned by this iterator are guaranteed to have length equal to
-/// `std::mem::size_of::<T>()`.
+/// `size_of::<T>()`.
 #[derive(Debug)]
 pub struct BitChunksExactMut<'a, T: BitChunk> {
     chunks: std::slice::ChunksExactMut<'a, u8>,
@@ -18,7 +18,7 @@ impl<'a, T: BitChunk> BitChunksExactMut<'a, T> {
     #[inline]
     pub fn new(bitmap: &'a mut [u8], length: usize) -> Self {
         assert!(length <= bitmap.len() * 8);
-        let size_of = std::mem::size_of::<T>();
+        let size_of = size_of::<T>();
 
         let bitmap = &mut bitmap[..length.saturating_add(7) / 8];
 

crates/polars-arrow/src/bitmap/utils/iterator.rs

@@ -176,7 +176,7 @@ impl<'a> BitmapIter<'a> {
         let num_words = n / 64;
 
         if num_words > 0 {
-            assert!(self.bytes.len() >= num_words * std::mem::size_of::<u64>());
+            assert!(self.bytes.len() >= num_words * size_of::<u64>());
 
             bitmap.extend_from_slice(self.bytes, 0, num_words * u64::BITS as usize);
 
@@ -189,7 +189,7 @@ impl<'a> BitmapIter<'a> {
             return;
         }
 
-        assert!(self.bytes.len() >= std::mem::size_of::<u64>());
+        assert!(self.bytes.len() >= size_of::<u64>());
 
         self.word_len = usize::min(self.rest_len, 64);
         self.rest_len -= self.word_len;

crates/polars-arrow/src/buffer/immutable.rs

@@ -299,10 +299,10 @@ impl<T: crate::types::NativeType> From<arrow_buffer::Buffer> for Buffer<T> {
 impl<T: crate::types::NativeType> From<Buffer<T>> for arrow_buffer::Buffer {
     fn from(value: Buffer<T>) -> Self {
         let offset = value.offset();
-        value.storage.into_arrow_buffer().slice_with_length(
-            offset * std::mem::size_of::<T>(),
-            value.length * std::mem::size_of::<T>(),
-        )
+        value
+            .storage
+            .into_arrow_buffer()
+            .slice_with_length(offset * size_of::<T>(), value.length * size_of::<T>())
     }
 }
 

crates/polars-arrow/src/compute/aggregate/memory.rs

@@ -18,7 +18,7 @@ macro_rules! dyn_binary {
         let values_end = offsets[offsets.len() - 1] as usize;
 
         values_end - values_start
-            + offsets.len() * std::mem::size_of::<$o>()
+            + offsets.len() * size_of::<$o>()
             + validity_size(array.validity())
     }};
 }
@@ -50,15 +50,15 @@ pub fn estimated_bytes_size(array: &dyn Array) -> usize {
         },
         Primitive(PrimitiveType::DaysMs) => {
             let array = array.as_any().downcast_ref::<DaysMsArray>().unwrap();
-            array.values().len() * std::mem::size_of::<i32>() * 2 + validity_size(array.validity())
+            array.values().len() * size_of::<i32>() * 2 + validity_size(array.validity())
         },
         Primitive(primitive) => with_match_primitive_type_full!(primitive, |$T| {
             let array = array
                 .as_any()
                 .downcast_ref::<PrimitiveArray<$T>>()
                 .unwrap();
 
-            array.values().len() * std::mem::size_of::<$T>() + validity_size(array.validity())
+            array.values().len() * size_of::<$T>() + validity_size(array.validity())
         }),
         Binary => dyn_binary!(array, BinaryArray<i32>, i32),
         FixedSizeBinary => {
@@ -74,7 +74,7 @@ pub fn estimated_bytes_size(array: &dyn Array) -> usize {
         List => {
             let array = array.as_any().downcast_ref::<ListArray<i32>>().unwrap();
             estimated_bytes_size(array.values().as_ref())
-                + array.offsets().len_proxy() * std::mem::size_of::<i32>()
+                + array.offsets().len_proxy() * size_of::<i32>()
                 + validity_size(array.validity())
         },
         FixedSizeList => {
@@ -84,7 +84,7 @@ pub fn estimated_bytes_size(array: &dyn Array) -> usize {
         LargeList => {
             let array = array.as_any().downcast_ref::<ListArray<i64>>().unwrap();
             estimated_bytes_size(array.values().as_ref())
-                + array.offsets().len_proxy() * std::mem::size_of::<i64>()
+                + array.offsets().len_proxy() * size_of::<i64>()
                 + validity_size(array.validity())
         },
         Struct => {
@@ -99,11 +99,11 @@ pub fn estimated_bytes_size(array: &dyn Array) -> usize {
         },
         Union => {
             let array = array.as_any().downcast_ref::<UnionArray>().unwrap();
-            let types = array.types().len() * std::mem::size_of::<i8>();
+            let types = array.types().len() * size_of::<i8>();
             let offsets = array
                 .offsets()
                 .as_ref()
-                .map(|x| x.len() * std::mem::size_of::<i32>())
+                .map(|x| x.len() * size_of::<i32>())
                 .unwrap_or_default();
             let fields = array
                 .fields()
@@ -124,7 +124,7 @@ pub fn estimated_bytes_size(array: &dyn Array) -> usize {
         BinaryView => binview_size::<[u8]>(array.as_any().downcast_ref().unwrap()),
         Map => {
             let array = array.as_any().downcast_ref::<MapArray>().unwrap();
-            let offsets = array.offsets().len_proxy() * std::mem::size_of::<i32>();
+            let offsets = array.offsets().len_proxy() * size_of::<i32>();
             offsets + estimated_bytes_size(array.field().as_ref()) + validity_size(array.validity())
         },
     }

crates/polars-arrow/src/ffi/array.rs

@@ -225,11 +225,7 @@ unsafe fn get_buffer_ptr<T: NativeType>(
         );
     }
 
-    if array
-        .buffers
-        .align_offset(std::mem::align_of::<*mut *const u8>())
-        != 0
-    {
+    if array.buffers.align_offset(align_of::<*mut *const u8>()) != 0 {
         polars_bail!( ComputeError:
             "an ArrowArray of type {dtype:?}
             must have buffer {index} aligned to type {}",
@@ -294,7 +290,7 @@ unsafe fn create_buffer<T: NativeType>(
 
     // We have to check alignment.
     // This is the zero-copy path.
-    if ptr.align_offset(std::mem::align_of::<T>()) == 0 {
+    if ptr.align_offset(align_of::<T>()) == 0 {
         let storage = SharedStorage::from_internal_arrow_array(ptr, len, owner);
         Ok(Buffer::from_storage(storage).sliced(offset, len - offset))
     }

crates/polars-arrow/src/io/avro/read/deserialize.rs

@@ -195,19 +195,17 @@ fn deserialize_value<'a>(
                     array.push(Some(value))
                 },
                 PrimitiveType::Float32 => {
-                    let value =
-                        f32::from_le_bytes(block[..std::mem::size_of::<f32>()].try_into().unwrap());
-                    block = &block[std::mem::size_of::<f32>()..];
+                    let value = f32::from_le_bytes(block[..size_of::<f32>()].try_into().unwrap());
+                    block = &block[size_of::<f32>()..];
                     let array = array
                         .as_mut_any()
                         .downcast_mut::<MutablePrimitiveArray<f32>>()
                         .unwrap();
                     array.push(Some(value))
                 },
                 PrimitiveType::Float64 => {
-                    let value =
-                        f64::from_le_bytes(block[..std::mem::size_of::<f64>()].try_into().unwrap());
-                    block = &block[std::mem::size_of::<f64>()..];
+                    let value = f64::from_le_bytes(block[..size_of::<f64>()].try_into().unwrap());
+                    block = &block[size_of::<f64>()..];
                     let array = array
                         .as_mut_any()
                         .downcast_mut::<MutablePrimitiveArray<f64>>()
@@ -404,10 +402,10 @@ fn skip_item<'a>(
                     let _ = util::zigzag_i64(&mut block)?;
                 },
                 PrimitiveType::Float32 => {
-                    block = &block[std::mem::size_of::<f32>()..];
+                    block = &block[size_of::<f32>()..];
                 },
                 PrimitiveType::Float64 => {
-                    block = &block[std::mem::size_of::<f64>()..];
+                    block = &block[size_of::<f64>()..];
                 },
                 PrimitiveType::MonthDayNano => {
                     block = &block[12..];

crates/polars-arrow/src/io/ipc/read/read_basic.rs

@@ -17,10 +17,10 @@ fn read_swapped<T: NativeType, R: Read + Seek>(
     is_little_endian: bool,
 ) -> PolarsResult<()> {
     // slow case where we must reverse bits
-    let mut slice = vec![0u8; length * std::mem::size_of::<T>()];
+    let mut slice = vec![0u8; length * size_of::<T>()];
     reader.read_exact(&mut slice)?;
 
-    let chunks = slice.chunks_exact(std::mem::size_of::<T>());
+    let chunks = slice.chunks_exact(size_of::<T>());
     if !is_little_endian {
         // machine is little endian, file is big endian
         buffer
@@ -67,7 +67,7 @@ fn read_uncompressed_buffer<T: NativeType, R: Read + Seek>(
     length: usize,
     is_little_endian: bool,
 ) -> PolarsResult<Vec<T>> {
-    let required_number_of_bytes = length.saturating_mul(std::mem::size_of::<T>());
+    let required_number_of_bytes = length.saturating_mul(size_of::<T>());
     if required_number_of_bytes > buffer_length {
         polars_bail!(
             oos = OutOfSpecKind::InvalidBuffer {

crates/polars-arrow/src/io/ipc/write/serialize/mod.rs

@@ -283,7 +283,7 @@ fn _write_buffer_from_iter<T: NativeType, I: TrustedLen<Item = T>>(
     is_little_endian: bool,
 ) {
     let len = buffer.size_hint().0;
-    arrow_data.reserve(len * std::mem::size_of::<T>());
+    arrow_data.reserve(len * size_of::<T>());
     if is_little_endian {
         buffer
             .map(|x| T::to_le_bytes(&x))
@@ -303,7 +303,7 @@ fn _write_compressed_buffer_from_iter<T: NativeType, I: TrustedLen<Item = T>>(
     compression: Compression,
 ) {
     let len = buffer.size_hint().0;
-    let mut swapped = Vec::with_capacity(len * std::mem::size_of::<T>());
+    let mut swapped = Vec::with_capacity(len * size_of::<T>());
     if is_little_endian {
         buffer
             .map(|x| T::to_le_bytes(&x))

crates/polars-arrow/src/legacy/kernels/mod.rs

@@ -59,8 +59,7 @@ impl<'a> MaskedSlicesIterator<'a> {
     pub(crate) fn new(mask: &'a BooleanArray) -> Self {
         let chunks = mask.values().chunks::<u64>();
 
-        let chunk_bits = 8 * std::mem::size_of::<u64>();
-        let chunk_len = mask.len() / chunk_bits;
+        let chunk_len = mask.len() / 64;
         let remainder_len = chunks.remainder_len();
         let remainder_mask = chunks.remainder();
 

crates/polars-arrow/src/mmap/array.rs

@@ -35,7 +35,7 @@ fn check_bytes_len_and_is_aligned<T: NativeType>(
     bytes: &[u8],
     expected_len: usize,
 ) -> PolarsResult<bool> {
-    if bytes.len() < std::mem::size_of::<T>() * expected_len {
+    if bytes.len() < size_of::<T>() * expected_len {
         polars_bail!(ComputeError: "buffer's length is too small in mmap")
     };
 
@@ -281,7 +281,7 @@ fn mmap_primitive<P: NativeType, T: AsRef<[u8]>>(
     let bytes = get_bytes(data_ref, block_offset, buffers)?;
     let is_aligned = check_bytes_len_and_is_aligned::<P>(bytes, num_rows)?;
 
-    let out = if is_aligned || std::mem::size_of::<T>() <= 8 {
+    let out = if is_aligned || size_of::<T>() <= 8 {
         assert!(
             is_aligned,
             "primitive type with size <= 8 bytes should have been aligned"

crates/polars-arrow/src/storage.rs

@@ -100,9 +100,9 @@ impl<T> SharedStorage<T> {
 impl<T: crate::types::NativeType> SharedStorage<T> {
     pub fn from_arrow_buffer(buffer: arrow_buffer::Buffer) -> Self {
         let ptr = buffer.as_ptr();
-        let align_offset = ptr.align_offset(std::mem::align_of::<T>());
+        let align_offset = ptr.align_offset(align_of::<T>());
         assert_eq!(align_offset, 0, "arrow_buffer::Buffer misaligned");
-        let length = buffer.len() / std::mem::size_of::<T>();
+        let length = buffer.len() / size_of::<T>();
 
         let inner = SharedStorageInner {
             ref_count: AtomicU64::new(1),
@@ -119,7 +119,7 @@ impl<T: crate::types::NativeType> SharedStorage<T> {
 
     pub fn into_arrow_buffer(self) -> arrow_buffer::Buffer {
         let ptr = NonNull::new(self.as_ptr() as *mut u8).unwrap();
-        let len = self.len() * std::mem::size_of::<T>();
+        let len = self.len() * size_of::<T>();
         let arc = std::sync::Arc::new(self);
         unsafe { arrow_buffer::Buffer::from_custom_allocation(ptr, len, arc) }
     }

crates/polars-arrow/src/types/bit_chunk.rs

@@ -72,7 +72,7 @@ impl<T: BitChunk> BitChunkIter<T> {
     /// Creates a new [`BitChunkIter`] with `len` bits.
     #[inline]
     pub fn new(value: T, len: usize) -> Self {
-        assert!(len <= std::mem::size_of::<T>() * 8);
+        assert!(len <= size_of::<T>() * 8);
         Self {
             value,
             remaining: len,

crates/polars-arrow/src/types/native.rs

@@ -60,7 +60,7 @@ macro_rules! native_type {
         impl NativeType for $type {
             const PRIMITIVE: PrimitiveType = $primitive_type;
 
-            type Bytes = [u8; std::mem::size_of::<Self>()];
+            type Bytes = [u8; size_of::<Self>()];
             #[inline]
             fn to_le_bytes(&self) -> Self::Bytes {
                 Self::to_le_bytes(*self)