Refactoring: Improve string processing #4210
Merged
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Which issue(s) this PR fixes:
Partially resolves: #4099
What this PR does / why we need it:
This PR improves string processing by using more efficient methods.
In most cases, the performance differences between the old and new methods are shown as microbenchmarks at https://github.com/fastruby/fast-ruby.
Docs Changes:
None
Release Note: