Compiled old code with 1.70.0 to compare to 1.69.0 and found an apparent perf regression.

Found `primes_ssoz`

times are slower while `[twin|cousin]primes_ssoz`

are faster.

For `primes_ssoz`

I get the best times compiled with just: `cargo build --release`

.

For `[twin|cousin]primes_ssoz`

I get best times compiled with:

`RUSTFLAGS="-C opt-level=3 -C debuginfo=0 -C target-cpu=native" cargo build --release`

Here are my Linux laptop specs.

```
➜ ~ inxi
CPU: 8-core AMD Ryzen 9 5900HX with Radeon Graphics (-MT MCP-)
speed/min/max: 1264/1200/4679 MHz Kernel: 6.1.34-pclos1 x86_64 Up: 1d 23h 8m
Mem: 10002.6/39489.1 MiB (25.3%) Storage: 953.87 GiB (13.4% used) Procs: 426
Shell: Zsh inxi: 3.3.26
```

Here are time comparisons for various input values

```
-----------------------|-------------------|-------------------|-------------------|
| primes_ssoz | twinprimes_ssoz | cousinprimes_ssoz |
Inputs |-------------------|-------------------|-------------------|
| 1.69.0 | 1.70.0 | 1.69.0 | 1.70.0 | 1.69.0 | 1.70.0 |
-----------------------|---------|---------|---------|---------|---------|---------|
1_000_000_000_000 | 19.2 | 24.3 | 10.1 | 10.0 | 10.1 | 10.0 |
-----------------------|---------|---------|---------|---------|---------|---------|
5_000_000_000_000 | 107.0 | 127.7 | 59.1 | 56.8 | 59.2 | 56.1 |
-----------------------|---------|---------|---------|---------|---------|---------|
10_000_000_000_000 | 254.6 | 311.1 | 133.1 | 127.4 | 129.8 | 126.4 |
```

Here are the source files:

primes_ssoz - Primes generator, multi-threaded using rayon, using SSoZ (Segmented Sieve of Zakiya), written in Rust · GitHub

twinprimes_ssoz - Twinprimes generator, multi-threaded using rayon, using SSoZ (Segmented Sieve of Zakiya), written in Rust · GitHub

cousinprimes_ssoz - Cousin Primes generator, multi-threaded, using SSoZ (Segmented Sieve of Zakiya), written in Rust · GitHub