issue-109, benchmarks were improved

[testisnullus]

Benchmarks were improved by reading sample data from the real .wbro file

Closes #109

[worryg0d]

I believe prepare_test_dir here is redundant because the benchmarks work only with f64 samples, not the wavbrro itself. So, you may just read the samples from it. Also, the comment doesn't fit the content. load_data_from_wbro_file doesn't decompress the data, it only reads f64 samples from wavbrros.

Suggested change

	fn prepare_test_dir() -> PathBuf {
	let test_dir = tempfile::tempdir().unwrap().into_path();
	fs::copy(TEST_WBRO_PATH, test_dir.join(TEST_FILE_NAME)).unwrap();
	test_dir
	}
	/// Loads the file, decompresses it using fft_to_data, and returns the decompressed Vec<f64>.
	fn load_data_from_wbro_file() -> Vec<f64> {
	let test_dir = prepare_test_dir();
	let test_file_path = test_dir.join(TEST_FILE_NAME);
	WavBrro::from_file(&test_file_path).unwrap()
	}
	/// Loads the file, decompresses it using fft_to_data, and returns the decompressed Vec<f64>.
	fn load_data_from_wbro_file() -> Vec<f64> {
	WavBrro::from_file(&test_file_path).unwrap()
	}

[testisnullus]

Yeah, my bad, will be fixed

[worryg0d]

I think you should revert it because the data provided by load_data_from_wbro_file is not decompressed