Shorter bytecode by leveraging repeatitive patterns

Cargo.toml

@@ -9,7 +9,7 @@ description = "Fast integer compression/decompression via SIMD bit-packing. Port
 edition = "2018"
 
 [dependencies]
-crunchy = "0.2"
+unroll = "0.1"
 
 [dev-dependencies]
 rand = "0.8"

src/bitpacker1x.rs

@@ -11,7 +11,7 @@ mod scalar {
 
     type DataType = u32;
 
-    fn set1(el: i32) -> DataType {
+    const fn set1(el: i32) -> DataType {
         el as u32
     }
 

src/bitpacker4x.rs

@@ -73,7 +73,7 @@ mod scalar {
 
     type DataType = [u32; 4];
 
-    fn set1(el: i32) -> DataType {
+    const fn set1(el: i32) -> DataType {
         [el as u32; 4]
     }
 

src/bitpacker8x.rs

@@ -82,7 +82,7 @@ mod scalar {
 
     type DataType = [u32; 8];
 
-    fn set1(el: i32) -> DataType {
+    const fn set1(el: i32) -> DataType {
         [el as u32; 8]
     }
 

src/bitpacking_bench.rs

@@ -151,7 +151,7 @@ fn criterion_benchmark_bitpacker<TBitPacker: BitPacker + 'static>(
     bitpacker: TBitPacker,
     criterion: &mut Criterion,
 ) {
-    for &num_bit in [1u8, 15u8, 31u8].iter() {
+    for &num_bit in [1u8, 24u8, 31u8].iter() {
         let num_bits = [num_bit; NUM_BLOCKS];
         criterion.bench(
             name,