Performance tuning of the parser

[stefansjs]

The 0.1.1 version of the plugin is rather slow with parsing and syntax highlighting. I'll want to do some performance tuning using features of the grammarkit bnf grammar. Additionally, a lot of syntax highlighting fails when some statements are incomplete.

Tuning Subtasks

• [x] Implement recoverWhile tuning for better error highlighting
• [ ] Cache reference finding
• [ ] Serialize named element to stub tree

References

• https://www.jetbrains.org/intellij/sdk/docs/reference_guide/performance/performance.html
• https://www.jetbrains.org/intellij/sdk/docs/basics/indexing_and_psi_stubs/stub_indexes.html
• https://github.com/JetBrains/Grammar-Kit/blob/master/HOWTO.md
• https://github.com/JetBrains/Grammar-Kit/blob/master/README.md#error-recovery-and-reporting

GrammarKit example

https://github.com/JetBrains/Grammar-Kit/blob/master/grammars/Grammar.bnf?source=c#L53

[stefansjs]

More reading: https://www.jetbrains.org/intellij/sdk/docs/basics/indexing_and_psi_stubs/stub_indexes.html

[stefansjs]

Another document to read https://www.jetbrains.org/intellij/sdk/docs/reference_guide/performance/performance.html