The analyzer parses files up to three times

[bwilkerson]

The analyzer parses each file up to three times, and this parsing shows up in the performance profile as a not insignificant part of the total time. There are a couple of things we could investigate that might improve the overall performance of the analyzer.

1. Caching the parsed AST until the analysis is complete so that we only need to parse each file one time.

2. Having a mode in the parser where it would skip function bodies (when all of the opening and closing braces are balanced, otherwise skipping the bodies might impact recovery).

3. Other general improvements to the performance of the parser.

[johnniwinther]

cc @jensjoha

[jensjoha]

If this is true it's an improvement from last I looked into that a few years ago where we parsed some files 4 times.