How do I use `native-comp-compiler-options`?

[StrawberryTea]

Hi. So I'm just wondering how to use `native-comp-compiler-options`.
Does it just take the same values that CFLAGS can take? I'm asking
because I patched my Emacs to define `native-comp-compiler-options` as

```
`("-march=skylake" "-Ofast" "-g0" "-fno-finite-math-only"
"-fomit-frame-pointer" "-malign-data=cacheline" "-fira-region=mixed"
"-fira-algorithm=CB" "-fira-hoist-pressure" "-fira-loop-pressure"
"-floop-nest-optimize" "-fgraphite-identity")
```

but I don't really notice any difference in performance in usage nor in
any of the benchmarks in my config file:
https://github.com/lemonbreezes/cae-emacs/blob/master/benchmarks/seq-cl-dash-benchmarks.org?plain=1#L9
https://github.com/lemonbreezes/cae-emacs/blob/master/benchmarks/silly-loop.el#L3

Nor do I see a difference when I compile `silly-loop` with and without
the above options. I am using `native-comp-speed` 3 and lexical binding
for all files and my GCC version is
```
gcc (Gentoo 14.0.0 p, commit d0b55776a4e1d2f293db5ba0e4a04aefed055ec4)
14.0.0 20230903 (experimental) a7d052b3200c7928d903a0242b8cfd75d131e374
```

I'm not sure if it's because my benchmarks are too trivial or because I
have `native-comp-speed` 3 so there is not much to optimize beyond that.
I definitely do notice the numbers change more when I recompile Emacs
itself with different CFLAGS and I think I did notice a difference
bumpin `native-comp-speed` up from 2 to 3 but not from setting
`native-comp-compiler-options`.