refactor: speed up writing model fields

[edkerk]

Main improvements in this PR:

• refactor:
  • importYaml speed improvement, contributing to importYaml is slow #387

On my PC, importYaml('../../model/Human-GEM.yml'); tooks 248 seconds before the change and 12 seconds after the change.

I hereby confirm that I have:

• Tested my code on my own computer for running the model
• Selected develop as a target branch

[mihai-sysbio]

🦄

[edkerk]

I couldn't stand not fixing the last part. It's now much faster, takes about 12 sec. I don't see room for more improvement.

[johan-gson]

Just take a look at the yamlFile things. I take it that you tested that it became faster?

[johan-gson]

Now it looks better!

[edkerk]

@haowang-bioinfo In f2d5352 I incorporated similar changes as you introduced in #392 (but not exactly the same as it wouldn't match the refactoring that I did). Can you please check that it matches the behaviour that you need?

[haowang-bioinfo]

@haowang-bioinfo In f2d5352 I incorporated similar changes as you introduced in #392 (but not exactly the same as it wouldn't match the refactoring that I did). Can you please check that it matches the behaviour that you need?

will look into this

[mihai-sysbio]

The importYaml function is used in the tests implemented with GH Actions. From the history I see the speedup is from ~5min30s down to ~1m30s. With this confirmed speed improvement and import tests passing, I will go ahead and merge this PR, thus resolving #387.