Fix performance regressions from #14737
#14737 (closed), while drastically improving performance on some edge cases, introduces performance regressions in 3 test cases:
- perf/compiler/parsing001.run
- perf/compiler/T9020.run
- perf/compiler/T12707.run
#14737 (closed), while drastically improving performance on some edge cases, introduces performance regressions in 3 test cases: