toml-rs / toml / 15691468015

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perf(toml): Don't recreate tables for make_owned  (#957)



Before
```console
$ cargo bench --bench 0-cargo -Ffast_hash -- 0_cargo::toml::detable_owned::2-features
    Finished `bench` profile [optimized] target(s) in 0.02s
     Running benches/0-cargo.rs (/home/epage/src/personal/toml/target/release/deps/0_cargo-ea11bd9a52599c35)
Timer precision: 13 ns
0_cargo              fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ toml                            │               │               │               │         │
   ╰─ detable_owned                │               │               │               │         │
      ╰─ 2-features  334.4 µs      │ 724.1 µs      │ 351.8 µs      │ 359.9 µs      │ 100     │ 100
```
After refactor
```console
$ cargo bench --bench 0-cargo -Ffast_hash -- 0_cargo::toml::detable_owned::2-features
    Finished `bench` profile [optimized] target(s) in 0.02s
     Running benches/0-cargo.rs (/home/epage/src/personal/toml/target/release/deps/0_cargo-ea11bd9a52599c35)
Timer precision: 11 ns
0_cargo              fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ toml                            │               │               │               │         │
   ╰─ detable_owned                │               │               │               │         │
      ╰─ 2-features  353.8 µs      │ 1.108 ms      │ 397.8 µs      │ 431.1 µs      │ 100     │ 100
```
After perf work
```console
$ cargo bench --bench 0-cargo -Ffast_hash -- 0_cargo::toml::detable_owned::2-features
   Compiling toml v0.8.23 (/home/epage/src/personal/toml/crates/toml)
   Compiling toml_benchmarks v0.0.0 (/home/epage/src/personal/toml/crates/benchmarks)
    Finished `bench` profile [optimized] target(s) in 19.01s
     Running benches/0-cargo.rs (/home/epage/src/personal/toml/target/release/deps/0_cargo-ea11bd9a52599c35)
Timer precision: 11 ns
0_cargo              fastest       │ slowest       │ median        │ mean  ... (continued)

0 of 14 new or added lines in 2 files covered. (0.0%)

6204 of 8956 relevant lines covered (69.27%)

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