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fc8c16eb82
This improves the performance of `str::parse` into integers.
Before:
```
compare fastest │ slowest │ median │ mean │ samples │ iters
╰─ std │ │ │ │ │
├─ 328920585 10.23 ns │ 24.8 ns │ 10.34 ns │ 10.48 ns │ 100 │ 25600
├─ 3255 8.551 ns │ 8.59 ns │ 8.551 ns │ 8.56 ns │ 100 │ 25600
╰─ 5 7.847 ns │ 7.887 ns │ 7.847 ns │ 7.853 ns │ 100 │ 25600
```
After:
```
compare fastest │ slowest │ median │ mean │ samples │ iters
╰─ std │ │ │ │ │
├─ 328920585 8.316 ns │ 23.7 ns │ 8.355 ns │ 8.491 ns │ 100 │ 25600
├─ 3255 4.566 ns │ 4.588 ns │ 4.586 ns │ 4.576 ns │ 100 │ 51200
╰─ 5 2.877 ns │ 3.697 ns │ 2.896 ns │ 2.945 ns │ 100 │ 102400
```
Benchmark:
```rust
fn std(input: &str) -> Result<u64, ParseIntError> {
input.parse()
}
```
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|---|---|---|
| .. | ||
| alloc | ||
| backtrace@230570f2da | ||
| core | ||
| panic_abort | ||
| panic_unwind | ||
| portable-simd | ||
| proc_macro | ||
| profiler_builtins | ||
| rtstartup | ||
| rustc-std-workspace-alloc | ||
| rustc-std-workspace-core | ||
| rustc-std-workspace-std | ||
| std | ||
| stdarch@ff9a444503 | ||
| sysroot | ||
| test | ||
| unwind | ||
| windows_targets | ||
| Cargo.lock | ||
| Cargo.toml | ||