# array-bytes
### A Collection of Array/Bytes/Hex Utilities.
[](https://www.gnu.org/licenses/gpl-3.0)
[](https://opensource.org/licenses/MIT)
[](https://github.com/hack-ink/array-bytes/actions/workflows/checks.yml)
[](https://docs.rs/array-bytes)
[](https://github.com/hack-ink/array-bytes/tags)
[](https://github.com/hack-ink/array-bytes)
[](https://github.com/hack-ink/array-bytes)
## Abilities
#### `TryFromHex` trait
- Convert hex to num
- type `AsRef<[u8]> -> isize`
- type `AsRef<[u8]> -> i8`
- type `AsRef<[u8]> -> i16`
- type `AsRef<[u8]> -> i32`
- type `AsRef<[u8]> -> i64`
- type `AsRef<[u8]> -> i128`
- type `AsRef<[u8]> -> usize`
- type `AsRef<[u8]> -> u8`
- type `AsRef<[u8]> -> u16`
- type `AsRef<[u8]> -> u32`
- type `AsRef<[u8]> -> u64`
- type `AsRef<[u8]> -> u128`
- Convert hex to array
- type `AsRef<[u8]> -> [u8; N]`, `N = { [1, 64], 128, 256, 512 }`
- type `AsRef<[u8]> -> Vec`
#### `Hex` trait
- Convert num to hex
- type `isize -> String`
- type `i8 -> String`
- type `i16 -> String`
- type `i32 -> String`
- type `i64 -> String`
- type `i128 -> String`
- type `usize -> String`
- type `u8 -> String`
- type `u16 -> String`
- type `u32 -> String`
- type `u64 -> String`
- type `u128 -> String`
- Convert array to hex
- type `Vec -> String`
- type `[u8; N] -> String`, `N = { [1, 64], 128, 256, 512 }`
- type `&[u8] -> String`
#### `slice` prefixed functions
- Build fixed length `Array` from `Slice`
- type `&[T] -> [T; N]`
- type `&[T] -> &[T; N]`
- Transform `Slice` to `G`
- type `&[T] -> G`
- e.g. `&[0_u8, ...] -> [u8; 20] -> H160`
#### `prefix` and `suffix` functions
- Prefixes/suffixes the given element to the given slice to make it a fixed-size array of length `N`.
#### `bytes` prefixed functions
- Convert bytes to hex
- type `AsRef<[u8]> -> String`
#### `hex` prefixed functions
- Convert `HexBytes` to hex
- type `&[u8] -> &str`
- e.g. `b"0x..." -> "0x..."`
- Transform hex from `Array`
- type `&str -> [u8; N]`
- Convert hex to bytes
- type `AsRef<[u8]> -> Vec`
- Convert hex to `Slice`
- type `AsRef<[u8]> -> &[u8]`
- Transform hex to `T`
- type `AsRef<[u8]> -> T`
- e.g. `"0x..." -> [u8; 20] -> H160`
#### `vec` prefixed functions
- Build fixed length `Array` from `Vec`
- type `Vec -> [T; N]`
- Transform `Vec` to `G`
- type `Vec -> G`
- e.g. `vec![0_u8, ...] -> [u8; 20] -> H160`
#### Serde support (require feature `serde`)
- `#[serde(deserialize_with = "array_bytes::hex_deserialize_n_into")]`
- type `S -> T`
- e.g. `"0x..." -> H160`
- `#[serde(deserialize_with = "array_bytes::de_hex2num")]`
- type `S -> Num`
- e.g. `"0xA" -> 10_u32`
- `#[serde(deserialize_with = "array_bytes::de_hex2bytes")]`
- type `S -> Vec`
- e.g. `"0x00" -> vec![0_u8]`
## Benchmark results
Tuesday, January 9th, 2024
```rs
array_bytes::bytes2hex time: [30.487 µs 30.513 µs 30.543 µs]
change: [-12.758% -7.1673% -2.3095%] (p = 0.00 < 0.05)
Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
3 (3.00%) high mild
1 (1.00%) high severe
const_hex::encode time: [2.1197 µs 2.2245 µs 2.3208 µs]
change: [+25.796% +31.010% +36.449%] (p = 0.00 < 0.05)
Performance has regressed.
faster_hex::hex_string time: [13.666 µs 13.711 µs 13.754 µs]
change: [-0.3508% +0.0892% +0.5043%] (p = 0.68 > 0.05)
No change in performance detected.
faster_hex::hex_encode_fallback
time: [13.476 µs 13.519 µs 13.564 µs]
change: [-0.1799% +0.2323% +0.6560%] (p = 0.27 > 0.05)
No change in performance detected.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high mild
hex::encode time: [133.99 µs 135.65 µs 137.13 µs]
change: [-1.6763% +0.2181% +2.1203%] (p = 0.82 > 0.05)
No change in performance detected.
Found 15 outliers among 100 measurements (15.00%)
13 (13.00%) low severe
2 (2.00%) low mild
rustc_hex::to_hex time: [118.83 µs 124.46 µs 129.51 µs]
change: [-3.5525% +2.8439% +10.307%] (p = 0.42 > 0.05)
No change in performance detected.
array_bytes::hex2bytes time: [46.892 µs 47.510 µs 48.195 µs]
change: [-8.2282% -6.5411% -4.6367%] (p = 0.00 < 0.05)
Performance has improved.
Found 6 outliers among 100 measurements (6.00%)
1 (1.00%) high mild
5 (5.00%) high severe
array_bytes::hex2bytes_unchecked
time: [73.450 µs 73.842 µs 74.251 µs]
change: [+0.5740% +1.3693% +2.1806%] (p = 0.00 < 0.05)
Change within noise threshold.
Found 17 outliers among 100 measurements (17.00%)
11 (11.00%) low mild
5 (5.00%) high mild
1 (1.00%) high severe
array_bytes::hex2slice time: [57.825 µs 57.915 µs 58.007 µs]
change: [-0.9051% -0.6249% -0.3523%] (p = 0.00 < 0.05)
Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
6 (6.00%) high mild
array_bytes::hex2slice_unchecked
time: [73.574 µs 73.917 µs 74.281 µs]
change: [-4.9137% -4.1840% -3.4519%] (p = 0.00 < 0.05)
Performance has improved.
Found 13 outliers among 100 measurements (13.00%)
8 (8.00%) high mild
5 (5.00%) high severe
const_hex::decode time: [15.849 µs 15.887 µs 15.924 µs]
change: [-3.1788% -2.1280% -1.2019%] (p = 0.00 < 0.05)
Performance has improved.
faster_hex::hex_decode time: [31.735 µs 31.764 µs 31.800 µs]
change: [-0.7403% -0.5216% -0.2674%] (p = 0.00 < 0.05)
Change within noise threshold.
Found 7 outliers among 100 measurements (7.00%)
5 (5.00%) high mild
2 (2.00%) high severe
faster_hex::hex_decode_unchecked
time: [13.059 µs 13.098 µs 13.145 µs]
change: [-0.7125% -0.3968% -0.1100%] (p = 0.01 < 0.05)
Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
6 (6.00%) high mild
4 (4.00%) high severe
faster_hex::hex_decode_fallback
time: [13.074 µs 13.090 µs 13.108 µs]
change: [-1.9404% -1.5652% -1.1912%] (p = 0.00 < 0.05)
Performance has improved.
Found 9 outliers among 100 measurements (9.00%)
5 (5.00%) high mild
4 (4.00%) high severe
hex::decode time: [131.19 µs 132.57 µs 134.26 µs]
change: [+1.9126% +3.2801% +4.8702%] (p = 0.00 < 0.05)
Performance has regressed.
Found 15 outliers among 100 measurements (15.00%)
15 (15.00%) high severe
hex::decode_to_slice time: [57.577 µs 58.018 µs 58.447 µs]
change: [+0.0185% +1.1253% +2.2104%] (p = 0.04 < 0.05)
Change within noise threshold.
Found 2 outliers among 100 measurements (2.00%)
1 (1.00%) high mild
1 (1.00%) high severe
rustc_hex::from_hex time: [130.19 µs 130.86 µs 131.48 µs]
change: [-1.8542% -1.4374% -0.9862%] (p = 0.00 < 0.05)
Change within noise threshold.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high mild
```