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lib: improve module loading performance

Rodrigo Muino Tomonari requested to merge github/fork/mscdex/perf-module-loading into master

This commit improves module loading performance by at least ~17-23% in the module-loader benchmarks.

This improvement is on top of the module loading performance boost brought on by #5123. Both PRs combined bring a total of ~54% improvement in module loading.

Some optimization strategies include:

  • Try-finally/try-catch isolation
  • Replacing regular expressions with manual parsers
  • Avoiding unnecessary string and array creation
  • Avoiding constant recompilation of anonymous functions and function definitions within functions

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